花岗岩石粉复合矿粉、粉煤灰对混凝土性能的影响  

Effect of Granite-stone Powder Compound Mineral Powder and Fly Ash on Concrete Properties

作　　者：李崇智 王琬怡 梁志勇 谈珽 彭家蔓 王坤 任强伟 LI Chongzhi;WANG Wanyi;LIANG Zhiyong;TAN Ting;PENG Jiaman;WANG Kun;REN Qiangwei(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Guangxi Baotian Environmental Protection Materials Co.,Ltd.,Nanning 530001,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]广西宝添环保材料有限公司,南宁530001

出　　处：《粉煤灰综合利用》2025年第1期24-28,共5页Fly Ash Comprehensive Utilization

摘　　要：为加强对花岗岩石粉高效利用和环境可持续发展的重视,研究花岗岩石粉对矿粉-粉煤灰复合水泥浆体及其制备的C30与C50混凝土性能的影响。结果表明,将花岗岩石粉内掺到1∶1矿粉和粉煤灰中,内掺10%时水泥浆体流动度最大,内掺超过30%时浆体的流动度急剧下降;对28 d水泥胶砂抗压强度的影响在内掺30%时达到最优,对抗折强度影响相对较小;内掺15%的花岗岩石粉复合掺合料应用于C30和C50混凝土,新拌混凝土工作性能良好,无离析泌水现象,混凝土表面平整,28 d抗压强度分别提升至36.7和56.8 MPa;碳化深度试验表明,适量的花岗岩石粉能够有效提升混凝土的抗碳化性能。To enhance the emphasis on the efficient utilization of granite powder and sustainable environmental development,the study explores the impact of granite powder on the properties of composite cement slurry consisting of mineral powder and fly ash,as well as the performance of the resulting C30 and C50 concrete.The results show that when the granite powder is mixed into 1∶1 mineral powder and fly ash,the fluidity of cement slurry reaches the maximum when the granite powder is mixed with 10%,and the fluidity of slurry decreases rapidly when the granite powder is mixed with more than 30%.The influence on compressive strength of 28 day cement mortar is the largest when 30% is added,and the influence on flexural strength is relatively small.When the composite admixture of 15% granite powder is applied to C30 and C50 concrete,the newly mixed concrete has good workability,no segregation and bleeding problem,the appearance of concrete is smooth,and the 28 day compressive strength increased to 36.7 MPa and 56.8 MPa.The carbonation depth test shows that an appropriate amount of granite powder can effectively improve the carbonation resistance of concrete.

关 键 词：花岗岩石粉 复合掺合料 混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]