本文選題：補償收縮 + 鋼渣混凝土��； 參考：《建筑材料學(xué)報》2017年04期

【摘要】：以廢棄鋼渣為粗骨料制備補償收縮鋼渣混凝土試件,并對其進行抗壓強度、彈性模量及泊松比試驗,分析了水灰比對補償收縮鋼渣混凝土試件破壞形態(tài)、抗壓強度、變形及應(yīng)力-應(yīng)變關(guān)系的影響.結(jié)果表明:補償收縮鋼渣混凝土試件破壞形態(tài)與普通混凝土相似,但前者出現(xiàn)裂縫時間較晚,裂縫發(fā)展速度較快,峰值應(yīng)變較小;隨著水灰比的減小,補償收縮鋼渣混凝土試件的抗壓強度逐漸增大,彈性模量先增后減;補償收縮鋼渣混凝土試件的變形、應(yīng)變和彈性模量均小于普通混凝土,泊松比是普通混凝土的2~3倍.由于補償收縮鋼渣混凝土內(nèi)部含有的缺陷和空隙較少,其應(yīng)力-應(yīng)變關(guān)系曲線的線性階段較長,曲線反彎點不明顯.基于補償收縮鋼渣混凝土試驗結(jié)果,提出了補償收縮鋼渣混凝土峰值應(yīng)力、峰值應(yīng)變、彈性模量和泊松比的計算方法,建立了補償收縮鋼渣混凝土應(yīng)力-應(yīng)變關(guān)系模型,此模型計算結(jié)果與試驗結(jié)果吻合較好.
[Abstract]:The concrete specimens with compensated shrinkage were prepared by using waste steel slag as coarse aggregate. The compressive strength, elastic modulus and Poisson's ratio were tested, and the failure mode and compressive strength of concrete specimens with water-cement ratio were analyzed. Effect of deformation and stress-strain relationship. The results show that the failure pattern of steel slag concrete with compensating shrinkage is similar to that of ordinary concrete, but the cracking time of the former is relatively late, the crack development speed is faster, the peak strain is smaller, and the ratio of water to cement decreases with the decrease of water-cement ratio. The compressive strength of steel slag concrete specimen increased gradually, the elastic modulus first increased and then decreased, and the deformation, strain and elastic modulus of compensating shrinkage steel slag concrete specimen were smaller than that of ordinary concrete, and Poisson's ratio was 2 ~ 3 times of that of ordinary concrete. Because there are less defects and voids in the concrete with compensating shrinkage, the linear stage of stress-strain relationship curve is longer, and the inverse bending point of the curve is not obvious. Based on the experimental results of compensating shrinkage steel slag concrete, the calculation method of peak stress, peak strain, elastic modulus and Poisson's ratio of compensating shrinkage steel slag concrete is put forward, and the stress-strain relation model of compensating shrinkage steel slag concrete is established. The calculated results of this model are in good agreement with the experimental results.
【作者單位】： 安徽工業(yè)大學(xué)建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51608003) 安徽省教育廳重大科學(xué)研究項目(KJ2015ZD10) 安徽省重點研究與開發(fā)計劃項目(1704a0802131) 安徽省自然科學(xué)基金資助項目(1208085QE88) 安徽省高校優(yōu)秀青年人才支持計劃重點項目(gxygZD2016072) 馬鞍山市科學(xué)技術(shù)項目(馬科,2012(6))
【分類號】：TU528

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