本文選題：載荷等級 + 礦物摻合料　； 參考：《建筑技術(shù)》2017年03期

【摘要】：對經(jīng)過0%σ_c,50%σ_c,65%σ_c,80%σ_c(壓縮強(qiáng)度極限)4種載荷等級循環(huán)加載后的單摻粉煤灰、單摻礦粉和復(fù)合摻料混凝土進(jìn)行吸水性試驗(yàn)研究。觀察其表面吸水概貌,分析載荷等級對吸水高度和吸水率參數(shù)的影響。結(jié)果表明,當(dāng)載荷小于50%σ_c時(shí),孔隙結(jié)構(gòu)發(fā)生彈性變形,微裂紋發(fā)展緩慢;當(dāng)載荷在50%σ_c~65%σ_c范圍內(nèi),混凝土試件中出現(xiàn)少數(shù)裂紋;當(dāng)載荷大于65%σ_c時(shí),混凝土試件中出現(xiàn)較多數(shù)貫穿裂紋;隨著載荷等級增大,混凝土的吸水高度和吸水率明顯增大,吸水高度h與t~(1/2)呈負(fù)指數(shù)關(guān)系。
[Abstract]:An experimental study on water absorption of concrete with single fly ash, mineral powder and compound admixture was carried out after cyclic loading of 80% 蟽 C (compressive strength limit), 50% 蟽 C, 65% 蟽 C, 65% 蟽 C, and 80% 蟽 C (compressive strength limit) after cyclic loading with coal ash, mineral powder and compound admixture concrete. The surface water absorption profile was observed and the influence of load grade on water absorption height and water absorption rate parameters was analyzed. The results show that when the load is less than 50% 蟽 _ C, elastic deformation occurs in the pore structure and the micro-crack develops slowly; when the load is in the range of 50% 蟽 _ c, 65% 蟽 _ c, a few cracks appear in the concrete specimen, and when the load is greater than 65% 蟽 _ c, there are a few cracks in the concrete specimen. With the increase of load grade, the water absorption height and water absorption rate of concrete obviously increase, and the water absorption height h has a negative exponential relationship with t ~ (1 / 2).
【作者單位】： 徐州工程學(xué)院土木工程學(xué)院;
【基金】：江蘇省“333工程”科研項(xiàng)目(BRA2015065) 住房和城鄉(xiāng)建設(shè)部科技計(jì)劃項(xiàng)目(2011-K6-15)
【分類號】：TU528
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本文編號：2001722