CAJ | 학술논문

主要研究煤矸石及孔结构特征对煤矸石混凝土性能的影响。研究方法采用自燃煤矸石，按50%和100%取代碎石配制C30混凝土，测试煤矸石混凝土工作性、强度、氯离子扩散系数；研究煤矸石混凝土水泥浆体与骨料交界面孔特征。试验结果表明：随着煤矸石取代量的提高，煤矸石混凝土流动性降低、强度下降，孔隙率提高，孔径、电通量增大。结论：随着煤矸石取代率的增加，煤矸石混凝土流动性降低10~20 mm，抗压强度降低8.62~11.47 MPa；当煤矸石取代率达到100%时，煤矸石混凝土孔体积是普通配合比体积的2倍，而平均孔径增大了2.6倍；氯离子扩散系数也明显增大。
주요연구매안석급공결구특정대매안석혼응토성능적영향。연구방법채용자연매안석，안50%화100%취대쇄석배제C30혼응토，측시매안석혼응토공작성、강도、록리자확산계수；연구매안석혼응토수니장체여골료교계면공특정。시험결과표명：수착매안석취대량적제고，매안석혼응토류동성강저、강도하강，공극솔제고，공경、전통량증대。결론：수착매안석취대솔적증가，매안석혼응토류동성강저10~20 mm，항압강도강저8.62~11.47 MPa；당매안석취대솔체도100%시，매안석혼응토공체적시보통배합비체적적2배，이평균공경증대료2.6배；록리자확산계수야명현증대。
The impacts of coal gangu and its pore structure on concrete characteristics were studied.C30 concrete was prepared which 50%and 100%of the grave masses were replaced by spontaneous combusting coal gangu.We discussed many properties of coal gangu concrete such as its workability,compressive strength,chlorine ion diffusion coefficient,pore structure features at transition zone of paste and aggregate.The test results showed that coal gaugu conctrete's fluidity and compressive strength decreased ,porosity,pore diameters and electric flux increased with the increase of the added coal gangu amount.With the dosage of coal gangu increased,the fluidity of coal gangu concrete would decrease 10~20 mm and compressive strength decrease 8.62~11.47 MPa.If 100%graves were replaced by coal gangu ,the pore volume was two times larger,average pore diameter 2.6 times while chloride ion diffusion coefficient increased significantly.