復(fù)摻粉煤灰和硅粉抗沖磨混凝土配合比設(shè)計(jì)及抗裂性能
發(fā)布時(shí)間:2018-07-27 17:07
【摘要】:抗沖磨混凝土(Abrasion Resistant Concrete)的抗裂性在學(xué)術(shù)上研究得較少。研究認(rèn)為針對(duì)高水頭、高速挾沙水流,抗沖磨混凝土的抗裂性應(yīng)作為主要耐久性指標(biāo)。為此設(shè)計(jì)了一系列不同配合比的抗沖磨混凝土,以脆性系數(shù)、干縮率2種指標(biāo),探討了粉煤灰和硅粉對(duì)抗沖磨混凝土抗裂性能的影響。結(jié)果表明:在摻20%FA、20%FA+(5%、8%、10%)SF的水泥膠凝材料漿體中,脆性系數(shù)與干縮率較小,水化產(chǎn)物以水化硅酸鈣占主體,漿體結(jié)構(gòu)致密,充分說(shuō)明粉煤灰和硅粉可優(yōu)化漿體結(jié)構(gòu),對(duì)提高抗沖磨混凝土的抗裂性有利。
[Abstract]:The cracking resistance of (Abrasion Resistant Concrete) has been studied less academically. It is considered that the crack resistance of anti-wear concrete should be regarded as the main durability index for high water head and high speed sand carrying flow. In this paper, a series of anti-wear concrete with different mix ratio were designed. The effects of fly ash and silica powder on the crack resistance of the concrete were discussed with two indexes of brittleness coefficient and dry shrinkage ratio. The results show that the brittleness coefficient and dry shrinkage rate of cement cementitious material with 20% 20% SF are small, the hydration products are mainly calcium silicate hydrate, and the slurry structure is dense. It fully shows that fly ash and silica powder can optimize the slurry structure. It is beneficial to improve the crack resistance of the anti-wear concrete.
【作者單位】: 武漢大學(xué)水資源與水電工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國(guó)家大壩安全工程技術(shù)研究中心項(xiàng)目(2410100032)
【分類號(hào)】:TV431
本文編號(hào):2148543
[Abstract]:The cracking resistance of (Abrasion Resistant Concrete) has been studied less academically. It is considered that the crack resistance of anti-wear concrete should be regarded as the main durability index for high water head and high speed sand carrying flow. In this paper, a series of anti-wear concrete with different mix ratio were designed. The effects of fly ash and silica powder on the crack resistance of the concrete were discussed with two indexes of brittleness coefficient and dry shrinkage ratio. The results show that the brittleness coefficient and dry shrinkage rate of cement cementitious material with 20% 20% SF are small, the hydration products are mainly calcium silicate hydrate, and the slurry structure is dense. It fully shows that fly ash and silica powder can optimize the slurry structure. It is beneficial to improve the crack resistance of the anti-wear concrete.
【作者單位】: 武漢大學(xué)水資源與水電工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國(guó)家大壩安全工程技術(shù)研究中心項(xiàng)目(2410100032)
【分類號(hào)】:TV431
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