从微结构角度分析温度对水泥土强度形成的影响

In order to study effects of temperature fluctuation on gaining in strength, two distinct samples of cement-stabilized soils are conserved under 25±2℃,10±2℃,0± 2℃, whereafter their uniaxial compressive strength are mensurated , their photomicrographs of different ages are shot and characteristic parameters of microstructures are pick-uped and analyzed. The study’s findings indicate: when the stadium (within 1～4 day) is shorter, the uniaxial compressive strength of cement-stabilized soils doesn’t vary markedly accompanying with temperature variety, while 7～40 day, advancing protected temperatures influences on their strength exaltation; accompanying with stadia increasing characteristic parameters of microstructures are all varying markedly and have certain regulation; when the curing temperature is over 10℃, the cement internal in cement-stabilized soils is easy to hydrate; because silt have no structural coupling between grains and have lower hole ratio, the cement-stabilized silt’s strength is oppositely lower.