【摘要】：通過(guò)狗骨試件拉伸試驗(yàn)、數(shù)字圖像影像相關(guān)處理(DIC)和立方體試塊軸壓試驗(yàn),研究了高粉煤灰摻量的超高韌度水泥基復(fù)合材料(ECC)在亞高溫處理后的力學(xué)性能。結(jié)果表明:在不高于200℃的溫度處理后,ECC仍能實(shí)現(xiàn)多裂縫開(kāi)裂,并能有效地控制裂縫的寬度。50、100℃溫度處理明顯提高了ECC的抗拉強(qiáng)度和應(yīng)變能力,200℃時(shí)有所回落,但仍高于常溫水平。DIC法的測(cè)試結(jié)果顯示,各溫度工況下基體在極限拉伸時(shí)的裂縫寬度相近,不同溫度的影響主要體現(xiàn)在裂縫的數(shù)量上。在20、50和100℃時(shí),ECC抗壓強(qiáng)度大小相當(dāng),200℃時(shí)下降19.3%。適當(dāng)?shù)臏囟忍幚砜梢蕴岣逧CC基體的強(qiáng)度并改善纖維與基體的界面性能,從而提高ECC的抗拉性能和應(yīng)變硬化能力。
[Abstract]:The mechanical properties of high toughness cement based composite (ECC) with high fly ash content were studied by tensile test, digital image correlation processing (DIC) and cube specimen axial compression test. The results show that ECC can still realize multi-crack cracking after temperature treatment at not more than 200 鈩，

本文編號(hào)：2315563