CAJ | 학술논문

为有效和充分利用Ⅲ级粉煤灰与镁渣，以常用强度等级C30混凝土为研究对象，Ⅲ级粉煤灰取代率和镁渣掺量为因素，设计混合均匀试验方案U12（6，4），试验研究二因素耦合条件下混凝土的强度变化规律。对试验结果应用最小二乘拟合，建立了混凝土强度与粉煤灰取代率、镁渣掺量的非线性关系模型。因素效应分析表明：影响混凝土强度的主要因素是粉煤灰取代率，其次是镁渣掺量；Ⅲ级粉煤灰取代率的强度效应为负效应，镁渣掺量不大于49％时其强度效应为正效应，粉煤灰与镁渣的耦合效应为正效应；从强度和经济角度评价，以高粉煤灰取代率，较高镁渣掺量为混凝土配合比调控的最佳组合；对于C30混凝土，Ⅲ级粉煤灰与镁渣的合理组合为 f＝36％，m＝5％。
위유효화충분이용Ⅲ급분매회여미사，이상용강도등급C30혼응토위연구대상，Ⅲ급분매회취대솔화미사참량위인소，설계혼합균균시험방안U12（6，4），시험연구이인소우합조건하혼응토적강도변화규률。대시험결과응용최소이승의합，건립료혼응토강도여분매회취대솔、미사참량적비선성관계모형。인소효응분석표명：영향혼응토강도적주요인소시분매회취대솔，기차시미사참량；Ⅲ급분매회취대솔적강도효응위부효응，미사참량불대우49％시기강도효응위정효응，분매회여미사적우합효응위정효응；종강도화경제각도평개，이고분매회취대솔，교고미사참량위혼응토배합비조공적최가조합；대우C30혼응토，Ⅲ급분매회여미사적합리조합위 f＝36％，m＝5％。
In order to make use of grade Ⅲ fly ash and magnesium slag effectively and fully ,C30 concrete is commonly used as the re‐search object ,the grade Ⅲ fly ash replacement rate and magnesium slag content is used as the factors .The mixed test scheme U12 (6 ,4) is designed to do research on the strength rule of concrete by experiments in two factors coupling conditions .The nonlinear re‐gression mathematical model is established by least squares fitting between the strength of concrete and fly ash replacement rate , magnesium slag content .Analyses show that :the main factors influencing the strength of concrete is fly ash replacement rate ,fol‐lowed by magnesium slag content .From the strength and the economic evaluation ,high fly ash replacement rate and higher magnesi‐um slag contents are the best combination of regulation of concrete mixture ratio ;for concrete C30 ,reasonable combination of grade III fly ash and magnesium slag is f=36% ,m=5% .