本文選題：混凝土 + 鋼纖維��； 參考：《施工技術(shù)》2017年12期

【摘要】：混凝土中摻加微細(xì)鋼纖維不易結(jié)團(tuán),在摻量較大時(shí)分布均勻性良好,能更好地發(fā)揮鋼纖維增強(qiáng)、增韌和阻裂作用。采用摻加微細(xì)鋼纖維和高溫蒸汽養(yǎng)護(hù)配制高強(qiáng)混凝土,通過彎曲韌性試驗(yàn),計(jì)算彎曲韌性指數(shù),研究纖維摻量、水膠比和養(yǎng)護(hù)齡期等因素對(duì)韌性的影響。結(jié)果表明:鋼纖維體積率是影響彎曲韌性的主要因素,強(qiáng)度和彎曲韌性都隨著體積率增加而增大;適當(dāng)減小水膠比,可以提高混凝土的彎曲強(qiáng)度和韌性;蒸汽養(yǎng)護(hù)能提高鋼纖維混凝土的早期韌性和強(qiáng)度,恒溫90℃蒸汽養(yǎng)護(hù)48h然后轉(zhuǎn)標(biāo)準(zhǔn)養(yǎng)護(hù),3d等效彎曲強(qiáng)度達(dá)到28d等效彎曲強(qiáng)度的85.4%~90%。
[Abstract]:It is difficult to agglomerate with the addition of fine steel fiber in concrete, and the distribution uniformity is good when the content of steel fiber is high, which can play a better role in reinforcing, toughening and cracking resistance of steel fiber. High strength concrete was prepared by adding fine steel fiber and high temperature steam curing. The flexural toughness index was calculated by flexural toughness test, and the effects of fiber content, water / binder ratio and curing age on toughness were studied. The results show that the volume ratio of steel fiber is the main factor affecting flexural toughness, and the strength and toughness increase with the increase of volume ratio, and the flexural strength and toughness of concrete can be improved by decreasing the water-binder ratio properly. Steam curing can improve the early toughness and strength of steel fiber reinforced concrete (SFRC). Steam curing at 90 鈩，

本文編號(hào)：1910825