CAJ | 학술논문

煤矿膏体充填材料(CPBM)由煤矸石、粉煤灰、水泥和水为原料混合而成。为了了解各原料的性质，对煤矸石和粉煤灰的矿物组成、化学成分进行了分析，对固定配比CPBM在不同龄期的抗压强度、孔隙率和电阻率性能进行了研究，测定和观测7，14和28 d的矿物成分和微观结构；针对抗压强度、孔隙率、电阻率和水化过程之间存在的相关性进行了深入探讨。结果表明：1)随龄期的增长，CPBM抗压强度增强，毛细孔减少，孔隙率降低，电阻率增长。2) CPBM原料之间进行水化反应和火山灰反应，生成物是氢氧化钙、C-S-H凝胶和钙矾石。氢氧化钙晶体只存在于7 d龄期的CPBM中，14 d和28 d并未发现氢氧化钙晶体，钙矾石在28 d时化学表达式种类和晶体数量较7 d和14 d时明显增多，并且钙矾石晶体结构随龄期增加呈细长状生长。3)水化反应和火山灰反应是CPBM性能随龄期变化的根本原因，并且性能之间存在着相互联系。
매광고체충전재료(CPBM)유매안석、분매회、수니화수위원료혼합이성。위료료해각원료적성질，대매안석화분매회적광물조성、화학성분진행료분석，대고정배비CPBM재불동령기적항압강도、공극솔화전조솔성능진행료연구，측정화관측7，14화28 d적광물성분화미관결구；침대항압강도、공극솔、전조솔화수화과정지간존재적상관성진행료심입탐토。결과표명：1)수령기적증장，CPBM항압강도증강，모세공감소，공극솔강저，전조솔증장。2) CPBM원료지간진행수화반응화화산회반응，생성물시경양화개、C-S-H응효화개반석。경양화개정체지존재우7 d령기적CPBM중，14 d화28 d병미발현경양화개정체，개반석재28 d시화학표체식충류화정체수량교7 d화14 d시명현증다，병차개반석정체결구수령기증가정세장상생장。3)수화반응화화산회반응시CPBM성능수령기변화적근본원인，병차성능지간존재착상호련계。
Coal paste backfilling material (CPBM) is composed of coal gangue, flyash, ordinary port-land cement and tap water. In order to identify the properties of each raw material, the mineral composi-tion, chemical composition of coal gangue flyash have been analyzed;the compressive strength, porosi-ty and electrical resistivity have been studied at different curing times. The samples taken from curing time of 7 d, 14 d and 28 d, have been evaluated for their mineral composition and microstructure. The law of CPBM property with increasing curing time has been analyzed, and the correlation among the compressive strength, porosity, resistivity and hydrating process has also been deeply discussed. The results indicate that firstly, with the curing time increasing, compressive strength and electrical resistiv-ity are increasing, while porosity and small pore content are reducing. Secondly, hydrated and poz-zolanic reaction occur in the change of CPBM property, with calcium hydroxide, C-S-H gel and ettring-ite being the reaction products. The calcium hydroxide crystal is only found at the curing time of 7 d, not at 14 d and 28 d, and the types and quantities of ettringite crystal at 28 d are more than at 7 d and 14 <br> d. The crystal structure of 28 d presented more slender with the curing time increasing. Thirdly, the hy-drated and pozzolanic reaction are the two primary reasons causing the change of performance of CPBM strength with the change of curing time. Moreover,there is some interrelation between the per-formances.