水基钻井岩屑细集料取代率对水泥混凝土性能影响研究  

Study on the effect of water-based drilling rock chip fine aggregate substitution rate on the performance of pavement cement concrete

作　　者：何焱 何鑫[1] 唐庆 杨嵌 李世伟 余世杰 HE Yan;HE Xin;TANG Qing;YANG Qian;LI Shiwei;YU Shijie(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621000,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621000

出　　处：《四川建筑科学研究》2024年第4期56-62,共7页Sichuan Building Science

基　　金：国家自然科学基金项目(51108393);国家重大科技专项项目(2016ZX05040-006)。

摘　　要：为解决页岩气开采过程中产生的水基钻井岩屑资源化问题,以水基钻井岩屑作为研究对象,对其在水泥混凝土中的性能进行了研究。对不同水基钻井岩屑细集料取代率和不同水灰比的水泥混凝土分别进行了力学性能以及抗冻性试验研究。研究表明,在水基钻井岩屑取代部分细集料的不同水灰比水泥混凝土中,随着取代率的增加,其力学性能呈现不同的下降趋势。其中,抗压强度在取代率为15%时有回升,抗弯强度在取代率为5%~15%时有回升,劈裂抗拉强度呈现不断减小的趋势。水泥混凝土的抗冻性能随着水基钻井岩屑取代率的增加而加速劣化,水基钻井岩屑取代率应控制在15%以内。综合考虑,取代率为5%~15%的水基钻井岩屑可以考虑被应用在水泥混凝土中。In order to solve the problem of resource utilization of water-based drilling rock chips generated in the process of shale gas extraction,the performance of water-based drilling rock chips in cement concrete was investigated.The mechanical properties and frost resistance of cement concrete with different water-based drilling rock chips fine aggregate substitution rates and different water-cement ratios were investigated.The study shows that in different cement concrete with different water-cement ratios with water-based drilling rock chips replacing part of the cement concrete fine aggregate,the mechanical properties decrease with the increase of the substitution rate but show different decreasing trends.Among them,the compressive strength recovers at 15%substitution rate,the bending strength recovers at 5%-15%substitution rate,and the splitting tensile strength shows a decreasing trend.The frost resistance of cement concrete accelerates the deterioration with the increase of water-based drilling chip substitution rate,and the subsritution rate of water-based drilling rock chips should be controlled within 15%.Taken together,water-based drilling chips with a subsritution rate of 5%-15%can be considered for application in cement concrete.

关 键 词：水基钻井岩屑混凝土 取代率 水灰比 力学性能 抗冻性 

分 类 号：TU528[建筑科学—建筑技术科学]