石粉含量对中低强度等级混凝土工作性影响  

EFFECT OF STONE POWDER CONTENT ON THE WORKABILITY OF MEDIUM AND LOW STRENGTH CONCRETE

作　　者：包丽丽 BAO Lili(Heilongjiang Erjian Construction Engineering Co.,Ltd.,Harbin 150080,China)

机构地区：[1]黑龙江省二建建筑工程有限责任公司,哈尔滨150080

出　　处：《低温建筑技术》2020年第8期39-41,56,共4页Low Temperature Architecture Technology

摘　　要：机制砂在生产过程中拌合了一定量的石粉,这些石粉会对混凝土性能产生很大的影响。为了获知石粉含量对中低强度等级混凝土工作性能的影响,文中进行了石粉含量对混凝土工作性能影响试验研究,结果表明,随着石粉含量的增多,混凝土的工作性呈现先提高后降低的规律,C30级混凝土中的是石粉含量最佳值为13%,C40和C50混凝土的石粉含量适宜范围为10%,超过这个最佳含量后,混凝土工作性能下降明显。The manufactured sand produces a certain amount of stone powder during the production process,which will have a great influence on the performance of concrete. Therefore, this paper conducts an experimental study to obtain the influence of stone powder content on the working performance of concrete of medium and low strength grade. The results show that with the increase of the content of stone powder, the working performance of concrete increased first and then decreased. In addition, the optimum value of the content of stone powder in C30 grade concrete is 13%, and the appropriate range of the content of stone powder in C40 and C50 concrete is 10%.

关 键 词：机制砂 石粉含量 混凝土 工作性 

分 类 号：TU528.1[建筑科学—建筑技术科学]