混凝土
混凝土
혼응토
CONCRETE
2014年
1期
9-11
,共3页
大掺量粉煤灰混凝土%抗弯强度%双点加载试验%单点加载试验%离散系数
大摻量粉煤灰混凝土%抗彎彊度%雙點加載試驗%單點加載試驗%離散繫數
대참량분매회혼응토%항만강도%쌍점가재시험%단점가재시험%리산계수
concrete with high volume fly ash%bending strength%two points load test%single point load test%coefficient of variability
针对水泥取代率30%以上的大掺量粉煤灰混凝土的力学性能指标进行了测试。重点分析了单点及双点加载试验条件下，各龄期混凝土抗弯强度的增长率及误差。结果表明：双点加载条件下大掺量粉煤灰混凝土28、91 d抗弯强度及抗弯强度离散系数较单点加载条件下测试值减小；后期抗弯强度增长率测试值无明显差异；路面用混凝土在粉煤灰取代率大于规范规定的30%时，需考虑抗弯强度的误差影响。
針對水泥取代率30%以上的大摻量粉煤灰混凝土的力學性能指標進行瞭測試。重點分析瞭單點及雙點加載試驗條件下，各齡期混凝土抗彎彊度的增長率及誤差。結果錶明：雙點加載條件下大摻量粉煤灰混凝土28、91 d抗彎彊度及抗彎彊度離散繫數較單點加載條件下測試值減小；後期抗彎彊度增長率測試值無明顯差異；路麵用混凝土在粉煤灰取代率大于規範規定的30%時，需攷慮抗彎彊度的誤差影響。
침대수니취대솔30%이상적대참량분매회혼응토적역학성능지표진행료측시。중점분석료단점급쌍점가재시험조건하，각령기혼응토항만강도적증장솔급오차。결과표명：쌍점가재조건하대참량분매회혼응토28、91 d항만강도급항만강도리산계수교단점가재조건하측시치감소；후기항만강도증장솔측시치무명현차이；로면용혼응토재분매회취대솔대우규범규정적30%시，수고필항만강도적오차영향。
Mechanics Performance was tested to the rate more than 30%of concrete with high volume fly ash.It analyzed growth rate and error of the bending strength of concrete under test conditions of single point load test and two points load test.Test values of 28 d and 91 d of the bending strength and coefficient of variability of concrete with high volume fly Ash was decreased under two points load test ,Test values had no significant difference in the late;the bending strength of error influence should be considered that fly ash replacement ratio was greater than 30%.
