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泡沫混凝土复合保温墙板研究
Study on Foamed Concrete Composite Insulation Wallboards
2022年第8期
泡沫混凝土;复合保温墙板;发泡剂;抗压强度;抗开裂性能
Foamed concrete; Composite insulation wallboard; Foaming agent; Compressive strength; Cracking resistance
2022年第8期
10.19761/j.1000-4637.2022.08.070.05
项泽强1,李晓宁1,赵 敦1,颜小波1,梁泽锋2,孟志武1
1.中国建筑材料科学研究总院有限公司,北京 100024;2.北京城建一建设发展有限公司, 北京 100096

项泽强1,李晓宁1,赵 敦1,颜小波1,梁泽锋2,孟志武1

项泽强,李晓宁,赵敦,等.泡沫混凝土复合保温墙板研究[J].混凝土与水泥制品,2022(8):70-73,82.

XIANG Z Q,LI X N,ZHAO D,et al.Study on Foamed Concrete Composite Insulation Wallboards[J].China Concrete and Cement Products,2022(8):70-73,82.

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摘   要:以普通硅酸盐水泥、粉煤灰、硫铝酸盐水泥、石膏为胶凝材料,掺入减水剂、保水剂、纤维、发泡剂等制备了泡沫混凝土,通过分析发泡剂稳泡时间、泡沫混凝土的凝结时间、抗压强度和膨胀率确定了最优配合比,并对最优配合比下的墙板进行了中试试验。结果表明:发泡剂的最佳稳泡时间为1 h以内;当m普通硅酸盐水泥∶m粉煤灰∶m硫铝酸盐水泥∶m石膏=5.0∶4.0∶0.4∶0.6时,泡沫混凝土的初凝时间小于60 min,抗压强度>3.5 MPa,膨胀率达到镁基水泥水平,抗开裂性能良好,且此配合比下的墙板各项性能指标良好。 Abstract: Foamed concrete was prepared by using ordinary portland cement, fly ash, sulfoaluminate cement and gypsum as cementing materials, adding water reducing agent, water retaining agent, fiber and foaming agent. The optimal mix proportion was determined by analyzing the foam stabilization time of the foaming agent and the setting time, the compressive strength and the expansion rate of foamed concrete, and the pilot test was carried out for the wallboard under the optimal mix proportion. The results show that the optimum foam stabilization time of the foaming agent is within 1 h. When mordinary portland cement ∶ mfly ash ∶ msulphoaluminate cement ∶ mgypsum is 5.0∶4.0∶0.4∶0.6, the initial setting time of foamed concrete is less than 60 min, the compressive strength is more than 3.5 MPa, the expansion rate reaches the level of magnesium based cement, the cracking resistance is good, and all performance indexes of wallboard under this mix proportion are good.
英文名 : Study on Foamed Concrete Composite Insulation Wallboards
刊期 : 2022年第8期
关键词 : 泡沫混凝土;复合保温墙板;发泡剂;抗压强度;抗开裂性能
Key words : Foamed concrete; Composite insulation wallboard; Foaming agent; Compressive strength; Cracking resistance
刊期 : 2022年第8期
DOI : 10.19761/j.1000-4637.2022.08.070.05
文章编号 :
基金项目 :
作者 : 项泽强1,李晓宁1,赵 敦1,颜小波1,梁泽锋2,孟志武1
单位 : 1.中国建筑材料科学研究总院有限公司,北京 100024;2.北京城建一建设发展有限公司, 北京 100096

项泽强1,李晓宁1,赵 敦1,颜小波1,梁泽锋2,孟志武1

项泽强,李晓宁,赵敦,等.泡沫混凝土复合保温墙板研究[J].混凝土与水泥制品,2022(8):70-73,82.

XIANG Z Q,LI X N,ZHAO D,et al.Study on Foamed Concrete Composite Insulation Wallboards[J].China Concrete and Cement Products,2022(8):70-73,82.

摘要
参数
结论
参考文献
引用本文

摘   要:以普通硅酸盐水泥、粉煤灰、硫铝酸盐水泥、石膏为胶凝材料,掺入减水剂、保水剂、纤维、发泡剂等制备了泡沫混凝土,通过分析发泡剂稳泡时间、泡沫混凝土的凝结时间、抗压强度和膨胀率确定了最优配合比,并对最优配合比下的墙板进行了中试试验。结果表明:发泡剂的最佳稳泡时间为1 h以内;当m普通硅酸盐水泥∶m粉煤灰∶m硫铝酸盐水泥∶m石膏=5.0∶4.0∶0.4∶0.6时,泡沫混凝土的初凝时间小于60 min,抗压强度>3.5 MPa,膨胀率达到镁基水泥水平,抗开裂性能良好,且此配合比下的墙板各项性能指标良好。

Abstract: Foamed concrete was prepared by using ordinary portland cement, fly ash, sulfoaluminate cement and gypsum as cementing materials, adding water reducing agent, water retaining agent, fiber and foaming agent. The optimal mix proportion was determined by analyzing the foam stabilization time of the foaming agent and the setting time, the compressive strength and the expansion rate of foamed concrete, and the pilot test was carried out for the wallboard under the optimal mix proportion. The results show that the optimum foam stabilization time of the foaming agent is within 1 h. When mordinary portland cement ∶ mfly ash ∶ msulphoaluminate cement ∶ mgypsum is 5.0∶4.0∶0.4∶0.6, the initial setting time of foamed concrete is less than 60 min, the compressive strength is more than 3.5 MPa, the expansion rate reaches the level of magnesium based cement, the cracking resistance is good, and all performance indexes of wallboard under this mix proportion are good.

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(1)自制改性松香型发泡剂C的稳泡性能最佳,稳泡时间为60 min内最佳。
(2)普通硅酸盐水泥、硫铝酸盐水泥和石膏三元胶凝体系的膨胀效果好于直接添加膨胀剂的二元胶凝体系,当控制配合比为m普通硅酸盐水泥∶m粉煤灰∶m硫铝酸盐水泥∶m石膏=5.0∶4.0∶0.4∶0.6时,泡沫混凝土的膨胀率能够达到镁基水泥的膨胀率水平。
(3)本文制得的复合墙板性能良好,面密度为55 kg/m2,传热系数0.75 W/(m2·K),抗压强度>3.5 MPa,抗弯承载倍数>2倍,外观质量合格,未出现开裂现象,具有良好的应用前景。

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[3] AMRAN Y H M,FARZADNIA N,ALI A A A.Properties and Applications of Foamed Concrete: A Review[J].Construction and Building Materials,2015,101:990-1005. 
[4] ELRAHMAN M A,MADAWY M E E,CHUNG S Y,et al.Preparation and Characterization of Ultra-lightweight Foamed Concrete Incorporating Lightweight Aggregates[J].Applied Sciences,2019,9(7):1-12.
[5] WAN K S,LI G,WANG S H,et al.3D Full Field Study of Drying Shrinkage of Foam Concrete[J].Cement and Concrete Composites,2017,82:217-226. 
[6] RAMAMURTHY K,NARAYANAN N.Influence of Composition and Curing on Drying Shrinkage of Aerated Concrete[J].Materials and Structures,2000,33:243-250.

项泽强,李晓宁,赵敦,.泡沫混凝土复合保温墙板研究[J].混凝土与水泥制品,2022(8):70-73,82.

XIANG Z Q,LI X N,ZHAO D,et al.Study on Foamed Concrete Composite Insulation Wallboards[J].China Concrete and Cement Products,2022(8):70-73,82.

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