CAJ | 학술논문

通过正交试验，研究了胶凝材料中粉煤灰、二水石膏、半水石膏和外加价掺量等因素对煤矸石作为集料的混凝土实心砖性能的影响。试验结果显示：粉煤灰对实心砖密度和力学性能影响最大，掺量从20%增加到60%后，实心砖密度从2163 kg/m3降低到2013 kg/m3，强度从25.8 MPa 降低到了6.5 MPa；外加剂、二水石膏和半水石膏对实心砖性能的改善也有一定的作用。通过试验得出煤矸石实心砖胶凝材料组分的适宜配合比是胶凝材料中粉煤灰占20%，半水石膏和二水石膏分别占4%和5%，外加剂掺量为胶凝材料总量的3%。
통과정교시험，연구료효응재료중분매회、이수석고、반수석고화외가개참량등인소대매안석작위집료적혼응토실심전성능적영향。시험결과현시：분매회대실심전밀도화역학성능영향최대，참량종20%증가도60%후，실심전밀도종2163 kg/m3강저도2013 kg/m3，강도종25.8 MPa 강저도료6.5 MPa；외가제、이수석고화반수석고대실심전성능적개선야유일정적작용。통과시험득출매안석실심전효응재료조분적괄의배합비시효응재료중분매회점20%，반수석고화이수석고분별점4%화5%，외가제참량위효응재료총량적3%。
Through the orthogonal experiments,the influences of fly ash,dihydrate gypsum,semi-hydrated gypsum and admixture in ce-mentitious materials on properties of solid concrete brick with coal gangue as its fine aggregate were studied.The results indicated that fly ash was the most influential factor on the density and mechanical properties of solid brick,with the increased of mixing amount of the fly ash in cementitious materials from 20% to 60%,density of the brick decreased from 2 163 kg/m3 to 2 013 kg/m3,and compressive strength decreased from 25.8 MPa to 6.5 MPa.The optimal formula of the cementitious materials in the experiment was 20% amount of fly ash,4%dihydrate gypsum,5% semi-hydrated gypsum and 3% admixture.