| 钙硅比对生物质灰渣加气混凝土性能的影响 |
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| 引用本文： | 蔡星,奚新国,吕洪杰,高欣. 钙硅比对生物质灰渣加气混凝土性能的影响[J]. 硅酸盐通报, 2018, 37(3): 800-804 |
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| 作者姓名： | 蔡星 奚新国 吕洪杰 高欣 |
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| 作者单位： | 江苏大学材料科学与工程学院,镇江 212013;盐城工学院材料科学与工程学院,盐城 224051;盐城工学院化学化工学院,盐城,224051 |
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| 基金项目： | 国家自然科学基金(21403184,51772258)%国家重点研发计划项目(2016YFC0209202)%江苏省高校自然科学研究项目(14KJB150025,15KJA430007,14KJB430023)%中国博士后科学基金(2014M561622)%江苏省生态建材与环保装备协同创新中心项目(GX2015102,GP201502)%2016年度江苏省省级新型墙体材料专项基金(201614)%江苏省高等学校大学生创新创业训练计划(201610305002Z)%盐城市农业科技创新专项引导资金项目(YK2016031) |
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| 摘 要： | 生物质灰渣含有较高的SiO2和CaO,与水泥、石灰等按一定的比例混掺,制备生物质灰渣加气混凝土砌块.实验通过改变生物质灰渣、粉煤灰和石灰的相对含量,调节加气混凝土砌块的钙硅比,并研究了钙硅比对其水化产物、机械力学性能和微观结构的影响.结果显示,随着钙硅比的增大,生物质灰渣加气混凝土砌块的干密度逐渐增大,钙硅比为0.86时,强度达到峰值,其抗压强度和抗折强度分别为2.5 MPa和1.8 MPa,且托勃莫来石的生成量也达到最大.干燥收缩图也表明钙硅比为0.86时,生物质灰渣加气混凝土砌块的体积性能最好,其最大干燥收缩率为0.44 mm/m,优于国家标准(0.5 mm/m).水化产物电镜图谱表明随着钙硅比的增加,生物质灰渣加气混凝土砌块的水化产物形貌由针棒状结构转变为片状结构.
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| 关 键 词： | 生物质灰渣 钙硅比 托勃莫来石 干燥收缩 加气混凝土砌块, |
Influence of Calcium-Silicon Ratio on Performance of Biomass Ash Aerated Concrete |
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| CAI Xing,XI Xin-guo,LYU Hong-jie,GAO Xin. Influence of Calcium-Silicon Ratio on Performance of Biomass Ash Aerated Concrete[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(3): 800-804 |
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| Authors: | CAI Xing XI Xin-guo LYU Hong-jie GAO Xin |
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| Abstract: | Biomass ash contains high SiO 2and CaO.It is mixed with cement,lime and so on according to a certain proportion to prepare biomass ash aerated concrete blocks.Calcium-silicon ratio of aerated concrete was adjusted to research its influence on hydration products, mechanical properties and microstructure by changing the relative content of biomass ash,fly ash and lime.Results show that with increase of calcium-silicon ratio,dry density of biomass ash aerated concrete blocks gradually increase. When the calcium-silicon ratio is 0.86, the intensity reached its peak, its compressive strength and flexural strength is 2.5 MPa and 1.8 MPa, respectively.And the production of tobermorite is also the largest.Dry shrinkage figure also shows that biomass ash aerated concrete blocks have excellent volume performance when the calcium-silicon ratio is 0.86, and its maximum dry shrinkage is 0.44 mm/m, better than national standard(0.5 mm/m).Electron microscopy map of hydration products shows that with increase of calcium-silicon ratio, hydration products morphology of biomass ash aerated concrete blocks transformed from elongated needle-like structure to lamellar structure. |
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| Keywords: | biomass ash calcium-silicon ratio tobermorite dry shrinkage aerated concrete block, |
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