本文選題：膠凝材料 + 精細(xì)混凝土　； 參考：《工程力學(xué)》2015年S1期

【摘要】：為了改善用于纖維編織網(wǎng)增強(qiáng)混凝土基體材料的精細(xì)混凝土的耐高溫性能,該文進(jìn)行了120個(gè)40mm×40mm×160mm棱柱體的高溫后抗折強(qiáng)度試驗(yàn)和240個(gè)40mm×40mm×40mm立方體的高溫后抗壓強(qiáng)度試驗(yàn)�？疾炝瞬煌z凝材料對(duì)精細(xì)混凝土試件高溫后力學(xué)性能的影響,包括外摻納米材料以及以高鋁水泥作為主要膠凝材料的影響。結(jié)果表明:體積摻量為1.5%和3.0%納米Si O2氣凝膠粉末未能改善精細(xì)混凝土的耐高溫性能,質(zhì)量摻量為5.0%納米陶瓷粉在目標(biāo)溫度TR=800℃時(shí)使基體混凝土的抗壓和抗折強(qiáng)度分別提高84.2%和120.9%。當(dāng)TR=800℃時(shí),采用高鋁水泥作為主要膠凝材料的試件力學(xué)性能均比普通精細(xì)混凝土試件大幅提高;各組摻入活性粉末的高鋁水泥混凝土試件在TR=800℃時(shí),相對(duì)抗壓和抗折強(qiáng)度均比未摻活性粉末時(shí)有所提高。
[Abstract]:In order to improve the high temperature resistance of fine concrete used for fiber woven mesh reinforced concrete matrix material, 120 40mm 脳 40mm 脳 160mm prisms were tested for flexural strength after high temperature and 240 40mm 脳 40mm 脳 40mm cubes were tested for compressive strength after high temperature. The effects of different cementing materials on the mechanical properties of fine concrete specimens after high temperature were investigated, including the effects of nano-doped materials and high alumina cement as the main cementitious materials. The results showed that the volume addition of 1.5% and 3.0% nano-SiO _ 2 aerogel powder could not improve the high temperature resistance of fine concrete. The compressive strength and flexural strength of the matrix concrete were increased by 84.2% and 120.9at the target temperature of TR=800 鈩，

本文編號(hào)：1907195