机制砂对喷射混凝土强度影响试验研究
Experimental Study on Influence of Machine-made Sand on Strength of Shotcrete
唐斌 1陈清运 1梅林芳 2向柳 1邵春悦 1石啸天 1魏敬芮3
作者信息
- 1. 武汉工程大学资源安全工程学院
- 2. 武钢资源集团有限公司
- 3. 中钢集团马鞍山矿山研究总院股份有限公司
- 折叠
摘要
以金山店铁矿机制砂为研究对象,对2种不同种类母岩机制砂分别开展X射线衍射试验、筛分试验和抗压强度试验,并与黄砂进行对比.试验结果表明,母岩为火成岩的机制砂喷射混凝土抗压强度最高,黄砂次之,沉积岩最低;长石含量是影响机制砂混凝土强度的主要因素,其次矿物的结晶结构和晶粒大小也影响机制砂强度;沉积岩机制砂母岩强度高、细度模数大,机制砂混凝土抗压强度与黄砂混凝土相比降低了14.4%;建议选用长石含量高,抗压强度适中的岩石制备的机制砂来作为井下喷浆用砂.
Abstract
Taking the machine-made sand of Jinshandian Iron Mine as the research object,X-ray dif-fraction test,sieve test and compressive strength test of two different kinds of mother-rock machine-made sand are carried out respectively,which compared with yellow sand.The test results show that the compres-sive strength of shotcrete with igneous parent rock is the highest,followed by yellow sand and sedimentary rock.The content of feldspar is the main factor affecting the strength of machine-made sand concrete,fol-lowed by the crystalline structure and grain size of minerals.The compressive strength of machine-made sand concrete is 14.4％ lower than that of yellow sand concrete because of its high strength and fineness mod-ulus.It is suggested that machine-made sand made of rocks with high feldspar content and moderate com-pressive strength should be used as sand for underground shotcrete.
关键词
机制砂混凝土/X射线衍射/筛分试验/抗压强度试验Key words
mechanism sand concrete/X-ray diffraction/sieve test/compressive strength test引用本文复制引用
出版年
2024
NETL
NSTL
万方数据