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基于正交试验的纳米CaCO3再生混凝土抗压强度研究
Study on Compressive Strengths of Recycled Concrete with Nano-CaCO3 Carbonate Based on Orthogonal Test
2020年第6期
正交试验;纳米CaCO3;再生混凝土;抗压强度
Orthogonal test; Nano-CaCO3; Recycled concrete; Compressive strength
2020年第6期
10.19761/j.1000-4637.2020.06.094.05
国家自然科学基金青年科学项目(51602198);浙江省自然科学基金项目(LY20E020006)。
胡海波1,闫春岭2,何智海1,李 增1,詹培敏1
1.绍兴文理学院 土木工程学院,312000;2.安阳工学院 土木与建筑工程学院,455000

胡海波1,闫春岭2,何智海1,李 增1,詹培敏1

胡海波,闫春岭,何智海,等.基于正交试验的纳米CaCO3再生混凝土抗压强度研究[J]混凝土与水泥制品,2020(6):94-97+102.

HU H B,YAN C L,HE Z H,et al.Study on Compressive Strengths of Recycled Concrete with Nano-CaCO3 Carbonate Based on Orthogonal Test[J].China Concrete and Cement Products,2020(6):94-97+102.

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摘 要:通过正交试验研究了纳米CaCO3掺量、水胶比、砂率和再生粗骨料掺量对再生混凝土抗压强度的影响。结果表明,影响再生混凝土7d抗压强度的主要因素是水胶比,而影响再生混凝土14d和28d抗压强度的主要因素是再生粗骨料掺量。此外,适量纳米CaCO3能够改善再生混凝土的抗压强度,其对早期抗压强度的提高更加明显。Abstract:Theeffectsofnano-CaCO3content,water-binderratio,sandratioandrecycledcoarseaggregatecontentonthecompressivestrengthofrecycledconcretewerestudiedbytheorthogonaltest.Theresultsshowthatthemainfactoraffecting7dcompressivestrengthofrecycledconcreteisthewater-binderratio,whilethemainfactoraffecting14dand28dcompressivestrengthofrecycledconcreteisthecontentofrecycledcoarseaggregate.Inaddition,thecompressivestrengthofrecycledconcretecanbeimprovedbyaddingtheappropriateamountofnano-CaCO3,andwhichismoreobviousfortheearlycompressivestrength.
英文名 : Study on Compressive Strengths of Recycled Concrete with Nano-CaCO3 Carbonate Based on Orthogonal Test
刊期 : 2020年第6期
关键词 : 正交试验;纳米CaCO3;再生混凝土;抗压强度
Key words : Orthogonal test; Nano-CaCO3; Recycled concrete; Compressive strength
刊期 : 2020年第6期
DOI : 10.19761/j.1000-4637.2020.06.094.05
文章编号 :
基金项目 : 国家自然科学基金青年科学项目(51602198);浙江省自然科学基金项目(LY20E020006)。
作者 : 胡海波1,闫春岭2,何智海1,李 增1,詹培敏1
单位 : 1.绍兴文理学院 土木工程学院,312000;2.安阳工学院 土木与建筑工程学院,455000

胡海波1,闫春岭2,何智海1,李 增1,詹培敏1

胡海波,闫春岭,何智海,等.基于正交试验的纳米CaCO3再生混凝土抗压强度研究[J]混凝土与水泥制品,2020(6):94-97+102.

HU H B,YAN C L,HE Z H,et al.Study on Compressive Strengths of Recycled Concrete with Nano-CaCO3 Carbonate Based on Orthogonal Test[J].China Concrete and Cement Products,2020(6):94-97+102.

摘要
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参考文献
引用本文

摘  要:通过正交试验研究了纳米CaCO3掺量、水胶比、砂率和再生粗骨料掺量对再生混凝土抗压强度的影响。结果表明,影响再生混凝土7 d抗压强度的主要因素是水胶比,而影响再生混凝土14 d和28 d抗压强度的主要因素是再生粗骨料掺量。此外,适量纳米CaCO3能够改善再生混凝土的抗压强度,其对早期抗压强度的提高更加明显。

Abstract: The effects of nano-CaCO3 content, water-binder ratio, sand ratio and recycled coarse aggregate content on the compressive strength of recycled concrete were studied by the orthogonal test. The results show that the main factor affecting 7 d compressive strength of recycled concrete is the water-binder ratio, while the main factor affecting 14 d and 28 d compressive strength of recycled concrete is the content of recycled coarse aggregate. In addition, the compressive strength of recycled concrete can be improved by adding the appropriate amount of nano-CaCO3, and which is more obvious for the early compressive strength.

关键词:
正交试验;纳米CaCO3;再生混凝土;抗压强度
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(1)龄期7 d时,影响再生混凝土抗压强度的主要因素是水胶比,其次是NC掺量和再生粗骨料掺量;龄期14 d、28 d时,影响再生混凝土抗压强度的主要因素是再生粗骨料掺量,其次是纳米碳酸钙掺量和水胶比;砂率对再生混凝土抗压强度的影响是最小的。
(2)适量NC的掺入能加快再生混凝土的水化反应速率,有效提高再生混凝土的早期抗压强度,其中,龄期14 d的NC再生混凝土的抗压强度能够到达28 d龄期强度的99%。
(3)适量NC的掺入能够将再生混凝土的抗压强度提升7%~10%,其中,含1.5%NC再生混凝土的抗压强度改善效果最佳,相比于未掺NC的试件提高了10%,这主要归因于NC良好的微集料效应和晶核效应。
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胡海波,闫春岭,何智海,.基于正交试验的纳米CaCO3再生混凝土抗压强度研究[J]混凝土与水泥制品,2020(6):94-97+102.

HU H B,YAN C L,HE Z H,et al.Study on Compressive Strengths of Recycled Concrete with Nano-CaCO3 Carbonate Based on Orthogonal Test[J].China Concrete and Cement Products,2020(6):94-97+102.

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