- 張 鵬,王 磊,王 娟,焦美菊
2020年3期
摘要
引用本文
摘要:基于坍落度、坍落擴展度、抗壓強度和抗壓彈性模量試驗,研究了體積摻量分別為0.05%、0.1%、0.15%、0.2%的PVA纖維和質量摻量分別為1%、2%、3%、4%的納米CaCO3顆粒對摻粉煤灰混凝土工作性和力學性能的影響。結果表明,在一定的摻量范圍內,隨著納米CaCO3摻量的增加,混凝土的抗壓強度和抗壓彈性模量先增大后減小,當納米CaCO3摻量為3% 時,抗壓強度和抗壓彈性模量達到最大值;隨著PVA纖維體積摻量的增加,混凝土抗壓強度先增大后減小,而抗壓彈性模量整體上呈逐漸減小的趨勢,當纖維體積摻量為0.15%和0.05%時,抗壓強度和抗壓彈性模量分別達到最大值;新拌混凝土的工作性隨著納米CaCO3和PVA纖維摻量的增加而逐漸降低。Abstract:The slump, slump spread, compressive strength and compressive elastic modulus tests were carried out, and the effects of PVA fiber with volume content of 0.05%, 0.1%, 0.15%, and 0.2% and nano-CaCO3 particles with mass content of 1%, 2%, 3%, and 4% on the workability and mechanical properties of fly ash concrete were studied. The results show that the compressive strength and compressive elastic modulus of concrete increase first and then decrease with the increase of nano-CaCO3 content within a certain range, and when the nano-CaCO3 content is 3%, the compressive strength and compressive elastic modulus can reach the maximum. The compressive strength increases first and then decreases with the increase of PVA fiber content, while the compressive elastic modulus decreases gradually as a whole, and when the content of PVA fiber are 0.15% and 0.05%, the compressive strength and compressive elastic modulus reach the maximum. The workability of fresh concrete gradually decreases with the increase of nano-CaCO3 and PVA fiber content.
張鵬,王磊,王娟,等.納米CaCO3和PVA纖維增強混凝土工作性及力學性能的研究[J].混凝土與水泥制品,2020(3):42-45,54.
ZHANG P,WANG L,WANG J,et al.Study on the Workability and Mechanical Properties of Nano-CaCO3 and PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2020(3):42-45,54.