Article(id=1241833155901067471, tenantId=1146029695717560320, journalId=1241755870837649424, issueId=1241833154382725178, articleNumber=null, orderNo=null, doi=10.19636/j.cnki.cjsm42-1250/o3.2025.013, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1748707200000, receivedDateStr=2025-06-01, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774005696511, onlineDateStr=2026-03-20, pubDate=1756224000000, pubDateStr=2025-08-27, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774005696511, onlineIssueDateStr=2026-03-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774005696511, creator=13701087609, updateTime=1774005696511, updator=13701087609, issue=Issue{id=1241833154382725178, tenantId=1146029695717560320, journalId=1241755870837649424, year='2025', volume='46', issue='4', pageStart='437', pageEnd='570', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774005696148, creator=13701087609, updateTime=1774005738977, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241833334083490628, tenantId=1146029695717560320, journalId=1241755870837649424, issueId=1241833154382725178, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241833334087684933, tenantId=1146029695717560320, journalId=1241755870837649424, issueId=1241833154382725178, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=473, endPage=487, ext={EN=ArticleExt(id=1241833157222273237, articleId=1241833155901067471, tenantId=1146029695717560320, journalId=1241755870837649424, language=EN, title=Concrete Modulus Evolution in Multiple Chemical Corrosion Processes, columnId=1241831201674171363, journalTitle=Chinese Journal of Solid Mechanics, columnName=Research Papers, runingTitle=null, highlight=null, articleAbstract=
Concrete structures in marine environments will be attacked by corrosive ions in seawater, including chloride ions, sulfate ions, etc. Those ions can significantly cause the degradation of the mechanical properties and durability of concrete. They can also cause problems like reinforcement corrosion, cracking, and spalling, and lead to the decrease of the service life of concrete structures and pose serious threats to structural safety. Investigating the evolution of mechanical properties of concrete under the combined action of sulfate and chloride ions is crucial for designing more durable concrete structures in marine environment. However, there is currently no consensus on the evolution of concrete modulus under such combined corrosion conditions. To address this gap, this paper presents an experimental study on the modulus evolution of concrete under the combined corrosion of sulfate and chloride ions. Concrete samples were prepared and subjected to accelerated corrosion experiments in artificial seawater. Ultrasonic non-destructive testing (NDT) was used to measure the changes in ultrasonic wave velocity in concrete. This allowed us to track the evolution of concrete modulus under corrosion conditions. Based on the experimental results, a mechanical-chemical model was developed. The model integrates the continuous hydration of concrete, the chemical reactions of sulfate ions with concrete, the complexation reactions of chloride ions, and other chemical processes. The model helps explain the competitive mechanism between sulfate and chloride ions during the corrosion process. The results show that the elastic modulus of concrete initially increases due to the filling effect of hydration products and the formation of ettringite and Friedel's salt. However, as the corrosion continues, the excessive filling of pores by expansive products caused by sulfate ions leads to a gradual decrease in modulus. The model successfully captures these changes and fits well with the experimental data. Additionally, it was found that chloride ions react with tricalcium aluminate to form Friedel's salt. This reduces the amount of ettringite formed by sulfate ions, thereby reducing the expansion force and delaying the decline in dynamic elastic modulus. This also reduces the damage caused by the expansion force. The findings provide a theoretical basis for designing concrete structures in marine environments with stronger resistance to sulfate and chloride corrosion. This can help engineers develop more effective strategies to enhance the durability of concrete in marine environments. This, in turn, can extend the service life of marine infrastructure and reduce maintenance costs.
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海水对混凝土的腐蚀具有多化学的特征,主要包括硫酸根离子、氯离子以及两者的耦合作用对混凝土的腐蚀. 目前硫酸根离子与氯离子共同腐蚀下的混凝土模量演化规律尚未形成共识. 本文制备混凝土样品开展了人工海水的加速腐蚀实验,利用无损探测技术探索了硫酸根离子和氯离子共同腐蚀下超声波在混凝土中传播速度的变化,由此得到混凝土模量在腐蚀条件下的演化规律. 以此为基础,结合材料的继续水化、硫酸根离子与混凝土的固相及液相化学反应、氯离子的络合反应等化学过程的反应方程式,以及相应的化学反应速率方程,建立了硫酸盐-氯盐耦合侵蚀下混凝土模量演化的力学-化学模型,并阐明了两种离子侵蚀的竞争机制,为设计耐久性更好的海工混凝土提供理论支持.
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Cement and Concrete Research,
2021,
144: 106406., articleTitle=On the competitive antagonism effect in combined chloride-sulfate attack: A numerical exploration, refAbstract=null)], funds=[Fund(id=1241833180630684393, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, awardId=11832013, language=CN, fundingSource=国家自然科学基金重点项目(11832013), fundOrder=null, country=null), Fund(id=1241833180706181866, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, awardId=2024Z256, language=CN, fundingSource=宁波市“科技创新甬江2035”重点技术攻关计划项目(2024Z256), fundOrder=null, country=null), Fund(id=1241833180802650861, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, awardId=2022Z209, language=CN, fundingSource=宁波市科技创新2025重大专项(2022Z209), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241833171478712862, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, xref=null, ext=[AuthorCompanyExt(id=1241833171487101471, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, companyId=1241833171478712862, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline, Ningbo University, Ningbo, 315211), AuthorCompanyExt(id=1241833171491295776, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, companyId=1241833171478712862, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=宁波大学压力容器与管道安全浙江省工程研究中心,宁波,315211)])], figs=[ArticleFig(id=1241833175379415671, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.1, caption=
Measure ultrasonic wave velocity, figureFileSmall=iFRcu2DEknk37Z9iB1k7qg==, figureFileBig=tecD6HMW9mq7nnpTNlecJQ==, tableContent=null), ArticleFig(id=1241833175454913146, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图1, caption=
测量超声波波速, figureFileSmall=iFRcu2DEknk37Z9iB1k7qg==, figureFileBig=tecD6HMW9mq7nnpTNlecJQ==, tableContent=null), ArticleFig(id=1241833175685599872, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.2, caption=
The curve of the specimen dynamic elastic modulus with time, figureFileSmall=iZMSna2qI9PXe+3a5mngWw==, figureFileBig=Z+0nBoL/P9jsX9OJOG14fg==, tableContent=null), ArticleFig(id=1241833175790457476, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图2, caption=
试样动弹性模量随时间变化的曲线, figureFileSmall=iZMSna2qI9PXe+3a5mngWw==, figureFileBig=Z+0nBoL/P9jsX9OJOG14fg==, tableContent=null), ArticleFig(id=1241833175874343561, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.3, caption=
The curve of the specimen dynamic elastic modulus with time, figureFileSmall=FbWjoARX6sNpNnxBcQM1Hw==, figureFileBig=zi3l+YPAlhV+DZNIdTIMTw==, tableContent=null), ArticleFig(id=1241833175991784076, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图3, caption=
试样动弹性模量随时间变化的曲线, figureFileSmall=FbWjoARX6sNpNnxBcQM1Hw==, figureFileBig=zi3l+YPAlhV+DZNIdTIMTw==, tableContent=null), ArticleFig(id=1241833176084058768, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.4, caption=
The curve of the specimen dynamic elastic modulus with time, figureFileSmall=Fqg6LrfxjMj0eIl4/enQXw==, figureFileBig=VVZu7WVJZNLfkMyKeUTSyQ==, tableContent=null), ArticleFig(id=1241833176172139156, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图4, caption=
试样动弹性模量随时间变化的曲线, figureFileSmall=Fqg6LrfxjMj0eIl4/enQXw==, figureFileBig=VVZu7WVJZNLfkMyKeUTSyQ==, tableContent=null), ArticleFig(id=1241833176260219544, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.5, caption=
Derivation of dynamic elastic modulus evolution model, figureFileSmall=eBDM1D6I3GWuSfVkJctuDg==, figureFileBig=UoW8psk8q2Hla226xgeHPw==, tableContent=null), ArticleFig(id=1241833176344105627, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图5, caption=
动弹性模量演化模型推导图, figureFileSmall=eBDM1D6I3GWuSfVkJctuDg==, figureFileBig=UoW8psk8q2Hla226xgeHPw==, tableContent=null), ArticleFig(id=1241833176440574622, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.6, caption=
Evolution model and experimental results of dynamic elastic modulus of concrete under sulfate ion corrosion, figureFileSmall=hSESyOX1V5NrE9y5KThGuA==, figureFileBig=D2l5pCV/DAUzqq8fNcwVTw==, tableContent=null), ArticleFig(id=1241833176528655009, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图6, caption=
硫酸根离子腐蚀下混凝土动弹性模量演化模型与实验结果, figureFileSmall=hSESyOX1V5NrE9y5KThGuA==, figureFileBig=D2l5pCV/DAUzqq8fNcwVTw==, tableContent=null), ArticleFig(id=1241833176604152483, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.7, caption=
Evolution model and experimental results of dynamic elastic modulus of concrete under chloride ion corrosion, figureFileSmall=X0moHmiXv+5XiZhXrx5kFw==, figureFileBig=VUZqoE3THojYASF9JVC3xg==, tableContent=null), ArticleFig(id=1241833176692232870, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图7, caption=
氯离子腐蚀下混凝土动弹性模量演化模型与实验结果, figureFileSmall=X0moHmiXv+5XiZhXrx5kFw==, figureFileBig=VUZqoE3THojYASF9JVC3xg==, tableContent=null), ArticleFig(id=1241833176801284777, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Fig.8, caption=
Evolution model and experimental results of dynamic elastic modulus of concrete under sulfate ion-chloride ion corrosion, figureFileSmall=9Uyaw5v3Kgn8w3/NIcegFQ==, figureFileBig=sE4KOeEzqQj3868eYIwW6g==, tableContent=null), ArticleFig(id=1241833176893559467, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=图8, caption=
硫酸根离子-氯离子腐蚀下混凝土动弹性模量演化模型与实验结果, figureFileSmall=9Uyaw5v3Kgn8w3/NIcegFQ==, figureFileBig=sE4KOeEzqQj3868eYIwW6g==, tableContent=null), ArticleFig(id=1241833177065525933, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 1, caption=
Chemical composition of Portland cement (%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | Na2O | LOSS | f-CaO | C3S | C3A |
|---|
| 22.35 | 4.03 | 2.72 | 63.73 | 1.96 | 2.40 | 0.54 | 1.65 | 0.43 | 53.45 | 6.23 |
), ArticleFig(id=1241833177145217711, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表1, caption=
硅酸盐水泥化学成分(%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | Na2O | LOSS | f-CaO | C3S | C3A |
|---|
| 22.35 | 4.03 | 2.72 | 63.73 | 1.96 | 2.40 | 0.54 | 1.65 | 0.43 | 53.45 | 6.23 |
), ArticleFig(id=1241833177233298099, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 2, caption=
Performance table of Portland cement
, figureFileSmall=null, figureFileBig=null, tableContent=
| Project | Request | National standards GB175-2007 | Test results |
|---|
| SO3(%) | ≤ | 3.50 | 2.58 |
| MgO(%) | ≤ | 6.00 | 1.23 |
| Cl-(%) | ≤ | 0.06 | 0.04 |
| Fineness(%)(0.08 mm)or(0.045 mm) | ≤ | 10.00 | Qualified |
| 30.00 |
| Stability | | Qualified | |
| Condensation time(min) | ≥ | 45 | Qualified |
| ≤ | 600 | Qualified |
| Flexural Strength | 3天 | ≥ | 2.5 | 4.5 |
| 28天 | ≥ | 5.5 | 7.3 |
| Compressive Strength | 3天 | ≥ | 10.0 | 17.2 |
| 28天 | ≥ | 32.5 | 37.8 |
), ArticleFig(id=1241833177342350008, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表2, caption=
硅酸盐水泥性能表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Project | Request | National standards GB175-2007 | Test results |
|---|
| SO3(%) | ≤ | 3.50 | 2.58 |
| MgO(%) | ≤ | 6.00 | 1.23 |
| Cl-(%) | ≤ | 0.06 | 0.04 |
| Fineness(%)(0.08 mm)or(0.045 mm) | ≤ | 10.00 | Qualified |
| 30.00 |
| Stability | | Qualified | |
| Condensation time(min) | ≥ | 45 | Qualified |
| ≤ | 600 | Qualified |
| Flexural Strength | 3天 | ≥ | 2.5 | 4.5 |
| 28天 | ≥ | 5.5 | 7.3 |
| Compressive Strength | 3天 | ≥ | 10.0 | 17.2 |
| 28天 | ≥ | 32.5 | 37.8 |
), ArticleFig(id=1241833177417847482, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 3, caption=
Sand distribution status
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sand sieve pore size(mm) | Weight(g) | Divide the sieve surplus Ai(%) | Cumulative sieve residue Ai(%) |
|---|
| 4.75 | 21.4 | 4.3 | 4.3 |
| 2.36 | 23.7 | 4.7 | 9.0 |
| 1.18 | 59.3 | 11.9 | 20.9 |
| 0.60 | 127.5 | 25.5 | 46.4 |
| 0.30 | 159.9 | 32.0 | 78.4 |
| 0.15 | 77.2 | 15.4 | 93.8 |
| Fineness modulus calculation | | Mx=2.38 | |
| Fineness modulus | Coarse sand 3.1-3.7 | Medium sand 2.3-3.0 | Fine sand 1.6-2.2 |
| Sand genus | | Medium sand | |
), ArticleFig(id=1241833177514316476, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表3, caption=
砂集配状况表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sand sieve pore size(mm) | Weight(g) | Divide the sieve surplus Ai(%) | Cumulative sieve residue Ai(%) |
|---|
| 4.75 | 21.4 | 4.3 | 4.3 |
| 2.36 | 23.7 | 4.7 | 9.0 |
| 1.18 | 59.3 | 11.9 | 20.9 |
| 0.60 | 127.5 | 25.5 | 46.4 |
| 0.30 | 159.9 | 32.0 | 78.4 |
| 0.15 | 77.2 | 15.4 | 93.8 |
| Fineness modulus calculation | | Mx=2.38 | |
| Fineness modulus | Coarse sand 3.1-3.7 | Medium sand 2.3-3.0 | Fine sand 1.6-2.2 |
| Sand genus | | Medium sand | |
), ArticleFig(id=1241833177598202560, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 4, caption=
Sand technical performance table
, figureFileSmall=null, figureFileBig=null, tableContent=
| Apparent density(g/cm3) | Porosity(%) | Water content(%) | Mud content(%) |
|---|
| 2400 | 42.0 | 2.4 | 0.5 |
| Fineness modulus | Grading area | Surface condition | |
| 2.38 | 2 | Round granular | |
), ArticleFig(id=1241833177728225986, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表4, caption=
砂技术性能表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Apparent density(g/cm3) | Porosity(%) | Water content(%) | Mud content(%) |
|---|
| 2400 | 42.0 | 2.4 | 0.5 |
| Fineness modulus | Grading area | Surface condition | |
| 2.38 | 2 | Round granular | |
), ArticleFig(id=1241833177816306373, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 5, caption=
Technical performance table of gravel
, figureFileSmall=null, figureFileBig=null, tableContent=
| Apparent density(g/cm3) | 2410 |
|---|
| Porosity | 39.0% |
| Gradation | 5~16 mm Continuous pellets |
| Mud content | 1.0% |
| Water content | 0.3% |
| Needle flake particle content | 9.1% |
), ArticleFig(id=1241833177900192456, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表5, caption=
碎石技术性能表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Apparent density(g/cm3) | 2410 |
|---|
| Porosity | 39.0% |
| Gradation | 5~16 mm Continuous pellets |
| Mud content | 1.0% |
| Water content | 0.3% |
| Needle flake particle content | 9.1% |
), ArticleFig(id=1241833177979884233, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 6, caption=
Gravel grading table
, figureFileSmall=null, figureFileBig=null, tableContent=
| Grading status(mm) | Circular sieve hole size(mm) |
|---|
| 2.5 | 5.0 | 10.0 | 16.0 |
| Sieve residual weight(g) | 37.7 | 480.0 | 425.9 | 28.5 |
| Cumulative sieve residue(by mass)(%) | 98.69 | 94.86 | 46.13 | 2.89 |
| Nominal particle size(mm)5~16 | 95~100 | 90~100 | 30~60 | 0~10 |
), ArticleFig(id=1241833179468862155, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表6, caption=
碎石级配表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Grading status(mm) | Circular sieve hole size(mm) |
|---|
| 2.5 | 5.0 | 10.0 | 16.0 |
| Sieve residual weight(g) | 37.7 | 480.0 | 425.9 | 28.5 |
| Cumulative sieve residue(by mass)(%) | 98.69 | 94.86 | 46.13 | 2.89 |
| Nominal particle size(mm)5~16 | 95~100 | 90~100 | 30~60 | 0~10 |
), ArticleFig(id=1241833179577914060, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 7, caption=
Performance indicators of tap water
, figureFileSmall=null, figureFileBig=null, tableContent=
| Test items | Relevant content |
|---|
| Sulfate(mg/L) | 200.00 |
| Chloride(mg/L) | 250.00 |
| Fluoride(mg/L) | 1.00 |
| Nitrate nitrogen(mg/L) | 20.00 |
| CCl4(ug/L) | 3.00 |
| Anionic synthetic detergent(mg/L) | 0.30 |
| Total dissolved solids(mg/L) | 1000.00 |
| Residual chlorine(mg/L) | 0.48 |
| Total hardness(CaCO3)(mg/L) | 450.00 |
| pH | 7.3 |
), ArticleFig(id=1241833179699548881, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表7, caption=
自来水性能指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| Test items | Relevant content |
|---|
| Sulfate(mg/L) | 200.00 |
| Chloride(mg/L) | 250.00 |
| Fluoride(mg/L) | 1.00 |
| Nitrate nitrogen(mg/L) | 20.00 |
| CCl4(ug/L) | 3.00 |
| Anionic synthetic detergent(mg/L) | 0.30 |
| Total dissolved solids(mg/L) | 1000.00 |
| Residual chlorine(mg/L) | 0.48 |
| Total hardness(CaCO3)(mg/L) | 450.00 |
| pH | 7.3 |
), ArticleFig(id=1241833179775046355, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 8, caption=
Composition of sodium chloride
, figureFileSmall=null, figureFileBig=null, tableContent=
| NaCl | GB/T1266-2006 |
|---|
| Molecular weight | 58.44 | pH(50 g/L,25 ℃) | 5.0~8.0 |
| NaCl content | ≥99.5% | Clarity test | Qualified |
| Maximum impurity content(index in%) |
| Water insoluble(w/%) | 0.00500 | Bromide(w/%) | 0.01000 |
| Dry burning is weightless(w/%) | 0.50000 | Iodide(w/%) | 0.00200 |
| Sulfate(w/%) | 0.00200 | Total nitrogen(w/%) | 0.00100 |
| Mg(w/%) | 0.00200 | K(w/%) | 0.02000 |
| Ca(w/%) | 0.00500 | Fe(w/%) | 0.00200 |
| As(w/%) | 0.00005 | Ba(w/%) | 0.00100 |
| Phosphate(w/%) | 0.00100 | Pb(w/%) | 0.00050 |
| Iron(II)hexacyanide(w/%) | 0.00010 |
), ArticleFig(id=1241833179858932437, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表8, caption=
氯化钠成分指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| NaCl | GB/T1266-2006 |
|---|
| Molecular weight | 58.44 | pH(50 g/L,25 ℃) | 5.0~8.0 |
| NaCl content | ≥99.5% | Clarity test | Qualified |
| Maximum impurity content(index in%) |
| Water insoluble(w/%) | 0.00500 | Bromide(w/%) | 0.01000 |
| Dry burning is weightless(w/%) | 0.50000 | Iodide(w/%) | 0.00200 |
| Sulfate(w/%) | 0.00200 | Total nitrogen(w/%) | 0.00100 |
| Mg(w/%) | 0.00200 | K(w/%) | 0.02000 |
| Ca(w/%) | 0.00500 | Fe(w/%) | 0.00200 |
| As(w/%) | 0.00005 | Ba(w/%) | 0.00100 |
| Phosphate(w/%) | 0.00100 | Pb(w/%) | 0.00050 |
| Iron(II)hexacyanide(w/%) | 0.00010 |
), ArticleFig(id=1241833179951207127, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 9, caption=
Technical indicators of sodium sulfate
, figureFileSmall=null, figureFileBig=null, tableContent=
| Na2SO4 | GB/T9853-2008 |
|---|
| Molecular formula | Na2SO4 | Relative molecular weight | 142.04 |
| Na2SO4(w/%) | ≥99.0000 | pH(50 g/L,25 ℃) | 5.0-8.0 |
| Impurity content(w%) |
| Clarity test/number | ≤3.0000 | Water insoluble | ≤0.0050 |
| Burning weightlessness | ≤0.2000 | chloride | ≤0.0010 |
| Phosphate | ≤0.0010 | Total Nitrogen | ≤0.0005 |
| K | ≤0.0100 | Ca(w/%) | ≤0.0020 |
| Fe | ≤0.0005 | Pb(w/%) | ≤0.0005 |
), ArticleFig(id=1241833180051870427, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表9, caption=
硫酸钠技术指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| Na2SO4 | GB/T9853-2008 |
|---|
| Molecular formula | Na2SO4 | Relative molecular weight | 142.04 |
| Na2SO4(w/%) | ≥99.0000 | pH(50 g/L,25 ℃) | 5.0-8.0 |
| Impurity content(w%) |
| Clarity test/number | ≤3.0000 | Water insoluble | ≤0.0050 |
| Burning weightlessness | ≤0.2000 | chloride | ≤0.0010 |
| Phosphate | ≤0.0010 | Total Nitrogen | ≤0.0005 |
| K | ≤0.0100 | Ca(w/%) | ≤0.0020 |
| Fe | ≤0.0005 | Pb(w/%) | ≤0.0005 |
), ArticleFig(id=1241833180148339421, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 10, caption=
Fitting parameters under sulfate ion corrosion
, figureFileSmall=null, figureFileBig=null, tableContent=
| Concentration |  | tp3(d) | m | η | tp4(d) |
|---|
| 3% Before injury | 1.0006 | 2.5695 | | | |
| 3% After the injury | 1.0006 | 2.5695 | 3.4968 | 2.9999 | 319.9339 |
| 8% Before injury | 1.0199 | 62.9042 | | | |
| 8% After the injury | 1.0199 | 62.9042 | 1.5092 | 25.6594 | 2.3807×104 |
), ArticleFig(id=1241833180223836895, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表10, caption=
硫酸根离子腐蚀下拟合参数表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Concentration |  | tp3(d) | m | η | tp4(d) |
|---|
| 3% Before injury | 1.0006 | 2.5695 | | | |
| 3% After the injury | 1.0006 | 2.5695 | 3.4968 | 2.9999 | 319.9339 |
| 8% Before injury | 1.0199 | 62.9042 | | | |
| 8% After the injury | 1.0199 | 62.9042 | 1.5092 | 25.6594 | 2.3807×104 |
), ArticleFig(id=1241833180286751459, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=EN, label=Table 11, caption=
Fitting parameters under chloride corrosion
, figureFileSmall=null, figureFileBig=null, tableContent=
| Concentration |  | t p2(d) |
|---|
| 3% | 1.0067 | 2.0178 |
| 8% | 0.9902 | 29.2543 |
), ArticleFig(id=1241833180358054629, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1241833155901067471, language=CN, label=表11, caption=
氯离子腐蚀下拟合参数表
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| Concentration |  | t p2(d) |
|---|
| 3% | 1.0067 | 2.0178 |
| 8% | 0.9902 | 29.2543 |
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Fitting parameters under sulfate-chloride corrosion
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| Concentration |  | tp2(d) |  | tp3(d) | m | η | tp4(d) |
|---|
| 3%+6% | 0.9554 | 0.9786 | 1.0582 | 1.1673 | | | |
| 5%+10% Before injury | 0.6777 | 47.6393 | 1.5315 | 84.5184 | | | |
| 5%+10% After the injury | 0.6777 | 47.6393 | 1.5315 | 84.5184 | 1.1205 | 1.4075 | 1.2359×103 |
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硫酸根-氯离子腐蚀下拟合参数表
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| Concentration |  | tp2(d) |  | tp3(d) | m | η | tp4(d) |
|---|
| 3%+6% | 0.9554 | 0.9786 | 1.0582 | 1.1673 | | | |
| 5%+10% Before injury | 0.6777 | 47.6393 | 1.5315 | 84.5184 | | | |
| 5%+10% After the injury | 0.6777 | 47.6393 | 1.5315 | 84.5184 | 1.1205 | 1.4075 | 1.2359×103 |
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