【作者】 赵苏政；

【导师】 王元纲；

【作者基本信息】 南京林业大学 ， 森林工程， 2008， 硕士

【摘要】 随着我国大规模建设基础设施,水泥混凝土研究与应用技术得到较快发展。而矿物掺合料是现代混凝土必不可少的重要组成之一,开发新型高效的矿物掺合料以满足现代混凝土的发展与需求,已成为水泥混凝土研究的一个重要内容。本文通过将磨细钢渣粉、磨细矿渣粉和粉煤灰配制成复合型掺合料,取代水泥配制成混凝土,对混凝土的抗压强度和耐久性能进行研究。本文的主要工作及取得成果包括如下几个方面。1、研究了,复合型掺合料的取代量、掺合料比例、水胶比和减水剂用量与混凝土强度的关系。研究结果表明减水剂掺量为1.6%、水胶比为0.39～0.42的条件下,复合型掺合料取代水泥量以30%为最佳。在掺合料中,钢渣粉、矿渣粉和粉煤灰三者的比例1:2:1为最佳。2、氯离子渗透试验研究了,掺合料掺量及龄期对混凝土强度的影响。随着掺合料掺量的增加混凝土的抗氯离子渗透能力有着明显的改善。普通混凝土用28天作为评价龄期是合理的,而掺复合型掺合料混凝土采用45天作为评价龄期较为合理。3、通过混凝土碳化试验研究了掺复合型掺合料混凝土的碳化规律。普通混凝土的抗碳化性能要好于掺磨细钢渣粉复合掺合料混凝土,对掺复合型掺合料混凝土的抗碳化能力,在掺合料掺量在30%时效果较好,随着掺合料掺量的增加,抗碳化能力下降。4、抗渗试验结果表明,掺复合型掺合料混凝土的抗渗透能力要强于普通混凝土。当掺合料取代量为50%时效果最好。掺入复合型掺合料的混凝土的干缩性能要优于普通混凝土。5、通过腐蚀试验研究了复合型掺合料对混凝土抵抗盐腐蚀能力的影响。掺复合型掺合料的取代量为40%时,混凝土抵抗盐溶液的能力较好,掺合料比例在1:1:1时较好。更多还原

【Abstract】 With the great construct of fundament in China, the use and study of concrete developed quickly. At the same time the study of compound mineral admixtures which used in concrete, become a very important part of it. To develop a new kind of mineral compound which can satisfied the development of mordant become a hot topic in the studying field of Portland cement.This thesis is a study about mineral compound with steel slag powder, blast furnace slag powder and fly ash, and to take part of cement, making concrete. Study concrete strength and long time durability of the concrete making with this kind of material. And there are same conclusions as follow.Study the relations between concrete strength and the ratio of compound mineral admixtures. And found that the water reducer used for 1.6%, the water cement ratio between 0.39 ~ 0.42, the compound mineral admixtures to take cement ratio 30% is best for the concrete strength. In the compound mineral admixtures steel slag, bounce power and fly ash under proportion of 1:2:1 is best.By concrete chloride ion permeation test, it is shows that the age and the use of mineral admixtures quantity have significantly effect to the concrete strength. With increasing the quantity of mineral admixtures, the quantity of concrete anti chloride ion permeation ability has serious improved. And to test the concrete’s anti chloride ion permeation ability, it is proper to common concrete use 28 day as its age, and 45 days as the evaluation age of compound mineral admixtures is reasonable.Also study the carbonization of the concrete with compound mineral admixtures. It is clear that the anti carbonization ability of common concrete is better than concrete with compound mineral admixtures, and the better proportion of admixtures is 30%, the more compound mineral admixtures use the worse of concrete anti carbonization.The test result of concrete anti water permeation shows that the concrete with compound mineral admixtures is better than common concrete. And when the admixtures proportion is 50% will be better. From corrosion test studied the compound mineral admixtures how to affect concrete anti salts corrosion ability. When the replace ratio is 40%, the proportion of compound mineral admixtures is 1:1:1, it is have a good ability to anti salts corrosion.更多还原