| 矿物掺合料对高性能混凝土耐久性的影响 |
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| 引用本文： | 田帅,吕剑锋,李世华,王俊杰,王模弼. 矿物掺合料对高性能混凝土耐久性的影响[J]. 混凝土与水泥制品, 2020, 0(10): 12-16. DOI: 10.19761/j.1000-4637.2020.10.012.05 |
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| 作者姓名： | 田帅 吕剑锋 李世华 王俊杰 王模弼 |
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| 作者单位： | 云南建投绿色高性能混凝土股份有限公司,云南 昭通 657000;云南省高性能混凝土工程研究中心,云南 昆明 650501;云南建投绿色高性能混凝土股份有限公司,云南 昭通 657000 |
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| 基金项目： | 云南省科技创新强省计划;云南省高新技术产业发展项目 |
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| 摘 要： | 研究了粉煤灰、矿渣粉的不同掺入方式对高性能混凝土(HPC)抗氯离子渗透性能及抗冻性能的影响。结果表明:在相同水胶比条件下,随着矿物掺合料掺量的增加,HPC的抗压强度逐渐降低;掺入适量的矿物掺合料可有效降低HPC的电通量,改善抗氯离子渗透性能;当矿物掺合料掺量为40%,且粉煤灰和矿渣粉质量复掺比例为3∶1时,HPC在28 d与84 d的电通量分别为641.6 C和380.5 C;在水胶比及含气量不变的情况下,随着矿物掺合料掺量的增加,HPC的抗冻性能逐渐变差,而未掺矿物掺合料的HPC抗冻性能最好,抗冻等级为F200。
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| 关 键 词： | 矿物掺合料 高性能混凝土 电通量 抗冻性能 |
The Effect of Mineral Admixtures on the Durability Performance of High Performance Concrete |
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| TIAN Shuai,LYU Jian-feng,LI Shi-hua,WANG Jun-jie,WANG Mo-bi. The Effect of Mineral Admixtures on the Durability Performance of High Performance Concrete[J]. China Concrete and Cement Products, 2020, 0(10): 12-16. DOI: 10.19761/j.1000-4637.2020.10.012.05 |
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| Authors: | TIAN Shuai LYU Jian-feng LI Shi-hua WANG Jun-jie WANG Mo-bi |
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| Affiliation: | (Yunnan Construction Investment Holding Green and High Performance Concrete Co.,Ltd.,Zhaotong 657000,China;Yunnan Engineering Research Center of High Performance Concrete,Kunming 650501,China) |
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| Abstract: | The effect of different mixing methods of fly ash and slag powder on the anti-chloride ion permeability and frost resistance of high performance concrete(HPC)were studied.The results show that the compressive strength of HPC decreases with the increase of mineral admixture when the water-binder ratio and air content are unchanged.The appropriate amount of mineral admixture can effectively reduce the electrical flux of HPC.And the resistance of HPC to chloride ion penetration is improved.When the content of mineral admixture is 40%and m(fly ash)∶m(slag powder)is 3∶1,the electric flux of concrete at the 28 d and 84 d is 641.6 C and 380.5 C respectively.With the addition of mineral admixtures,the frost resistance of concrete gradually deteriorates.The antifreeze performance of HPC without mineral admixture is the best,and the antifreeze grade is F200. |
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| Keywords: | Mineral admixture High performance concrete Coulomb electric flux Frost resistance |
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