矿用多功能类砂岩质高强度透水混凝土试配试验
Trial Configuration Test of Multifunctional Sandstone-like High Strength Pervious Concrete for Mine
周雷强 1司马珂冰 1李昊 2李佳2
作者信息
- 1. 河南省第三地质矿产调查院有限公司;河南省自然资源科技创新中心(信息感知技术应用研究)
- 2. 河南理工大学能源科学与工程学院
- 折叠
摘要
为探究水泥、砂岩碎渣、石英砂等原材料不同配比时胶结类砂岩质材料强度的变化规律,辅助少量添加剂配制具有一定透水性能的矿用多功能混凝土,采用正交设计的方法将原材料制备成不同配比的标准圆柱体试样,并借助YAW-150B全自动液压试验机开展了轴向压缩力学试验.试验结果表明:水灰比、砂岩废渣与水泥比和砂胶比3个因素都会对试件的强度产生影响.当渣泥比和砂胶比一定时,水灰比由0.39增至0.51的过程中,试件的抗压强度先增大后减小;水灰比为0.42时,试件强度达到最大,随着水灰比继续增大,类岩质试件的强度逐渐减小.渣泥比与类岩质材料的强度呈负相关关系,砂胶比由0.3增大到1.5的过程中,试件强度缓慢提升,砂胶比为0.9时的试件强度达到最大,随后试件强度随砂胶比的增大而快速下降.同时研究得出,研制的矿用类砂岩质混凝土的透水性与其厚度呈负相关关系,可为充填采矿时采场封闭墙厚度的确定提供理论参考.
Abstract
In order to explore the variation law of the strength of cemented sandstone-like materials with different ratios of raw materials such as cement,sandstone debris and quartz sand,a small amount of additives are used to prepare a mine multifunctional concrete with a certain water permeability.The raw mate-rials are prepared into standard cylinder samples with different proportions by orthogonal design method,and the axial compression mechanical test is carried out by means of YAW-150 B automatic hydraulic test-ing machine.The test results show that the three factors of water cement ratio,sandstone waste residue to ce-ment ratio and water-solid ratio will affect the strength of the specimen.When the slag-cement ratio and wa-ter-solid ratio are constant,the compressive strength of the specimen increases first and then decreases when the water-cement ratio increases from 0.39 to 0.51.When the water-cement ratio is 0.42,the strength of the specimen reaches the maximum.As the water-cement ratio continues to increase,the strength of the rock-like specimen gradually decreases.The slag-cement ratio is negatively correlated with the strength of the rock-like material.When the water-solid ratio increases from 0.3 to 1.5,the strength of the specimen in-creases slowly.When the water-solid ratio is 0.9,the strength of the specimen reaches the maximum,and then the strength of the specimen decreases rapidly with the increase of the water-solid ratio.At the same time,it is concluded that the permeability of the developed mine sandstone-like concrete is negatively corre-lated with its thickness,which can provide a theoretical reference for the determination of the thickness of the closed wall in the filling mining.
关键词
试配试验/多功能混凝土/类砂岩质材料/强度特征/透水特性Key words
trial configuration test/multi-functional concrete/sandstone-like material/strength characteristics/water permeability characteristics引用本文复制引用
出版年
2024
NETL
NSTL
万方数据