注浆法制备陶粒泡沫混凝土实验研究
发布时间：2019-06-26 21:31
【摘要】：陶粒泡沫混凝土是一种具有保温隔热、不燃、轻质和高强等优良特性的新型无机保温材料,能较好地满足现代建筑对节能、安全性和可持续发展的要求。论文提出了注浆法陶粒泡沫混凝土的制备方法,通过正交实验和性能优化,分析了水胶比、粉煤灰掺量、泡沫掺量和注浆压力等因素对注浆法陶粒泡沫混凝土性能和均匀性的影响,最终获得了性能良好的注浆法陶粒泡沫混凝土。同时,论文通过分析各因素对浆体流变性的影响,建立了浆体流变性与试件均匀性的关系,阐明了浆体流变性、注浆压力与填充速率的关系。总结得出以下结论:1.本研究利用压力注浆制备陶粒泡沫混凝土,泡沫混凝土浆体在压力作用下填充到自然堆满有陶粒的模具中,克服了传统搅拌工艺中陶粒易上浮的缺点,得到品质均匀的陶粒泡沫混凝土。2.正交实验的研究结果表明,影响注浆法陶粒泡沫混凝土干密度和28 d抗压强度因素的主次顺序:泡沫掺量、粉煤灰掺量和水胶比,影响均匀性因素的主次顺序:粉煤灰掺量、泡沫掺量和水胶比。注浆法陶粒泡沫混凝土的干密度随着注浆试件高度的增加而减小,干密度在水平方向上的分布以注浆孔为轴心对称分布,轴心位置的干密度最大。3.进一步的强度优化研究结果表明,水胶比、粉煤灰掺量、泡沫掺量和注浆压力对注浆法陶粒泡沫混凝土的抗压强度、比强度和均匀性均有影响。通过调整参数,最终得到干密度781 kg/m3、抗压强度5.2 MPa、导热系数0.182 W/(m·K)的高均匀性注浆法陶粒泡沫混凝土。4.研究利用流动度D和自定义的S值分别表征浆体的屈服应力和粘度,当浆体流动度D在170~220 mm范围时制备的成品均匀性好。不同水胶比以及不同泡沫掺量下表现为,浆体粘度越大,填充速率越慢。由于粉煤灰掺量不同引起粘度变化时,浆体在碰壁后才表现出浆体粘度越大,填充速率越慢的规律。注浆压力越大,填充速率也越快;填充速率的增长幅度随着注浆压力的增大而减小。
[Abstract]:Ceramsite foam concrete is a new type of inorganic thermal insulation material with excellent characteristics of thermal insulation, non-combustion, light weight and high strength, which can meet the requirements of energy saving, safety and sustainable development of modern buildings. In this paper, the preparation method of grouting ceramsite foam concrete is put forward. Through orthogonal experiment and performance optimization, the effects of water-binder ratio, fly ash content, foam content and grouting pressure on the performance and uniformity of grouting ceramsite foam concrete are analyzed. Finally, the grouting ceramsite foam concrete with good performance is obtained. At the same time, by analyzing the influence of various factors on the hemorheology of slurry, the relationship between the hemorheology of slurry and the uniformity of specimen is established, and the relationship between the hemorheology of slurry, grouting pressure and filling rate is expounded. The following conclusions are drawn: 1. In this study, ceramsite foam concrete was prepared by pressure grouting. The foam concrete slurry was filled into the mould filled with ceramsite under the action of pressure, which overcome the disadvantage that ceramsite is easy to float in the traditional mixing process, and obtained the ceramsite foam concrete with uniform quality. 2. The results of orthogonal experiment show that the primary and secondary order of the factors affecting the dry density and 28 d compressive strength of ceramsite foam concrete by grouting method is foam content, fly ash content and water-binder ratio, and the primary and secondary order of influencing uniformity factors is fly ash content, foam content and water-binder ratio. The dry density of ceramsite foam concrete by grouting method decreases with the increase of grouting specimen height. The distribution of dry density in horizontal direction is symmetrical distribution with grouting hole as axial center, and the dry density in axial center position is the largest. 3. The results of further strength optimization study show that the water-binder ratio, fly ash content, foam content and grouting pressure have effects on the compressive strength, specific strength and uniformity of ceramsite foam concrete by grouting method. By adjusting the parameters, the high uniformity grouting ceramsite foam concrete with dry density 781 kg/m3, compressive strength 5.2 MPa, thermal conductivity 0.182 W / (m 路K) is obtained. 4. The yield stress and viscosity of the slurry were characterized by the mobility D and the self-defined S value, respectively. when the slurry mobility D was in the range of 170 脳 220 mm, the uniformity of the finished product was good. The higher the viscosity of the slurry is, the slower the filling rate is when the ratio of water to glue is different and the content of foam is different. When the viscosity of the slurry changes due to the different content of fly ash, the higher the viscosity of the slurry is, the slower the filling rate is. The higher the grouting pressure is, the faster the filling rate is, and the increase range of filling rate decreases with the increase of grouting pressure.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528.2
[Abstract]:Ceramsite foam concrete is a new type of inorganic thermal insulation material with excellent characteristics of thermal insulation, non-combustion, light weight and high strength, which can meet the requirements of energy saving, safety and sustainable development of modern buildings. In this paper, the preparation method of grouting ceramsite foam concrete is put forward. Through orthogonal experiment and performance optimization, the effects of water-binder ratio, fly ash content, foam content and grouting pressure on the performance and uniformity of grouting ceramsite foam concrete are analyzed. Finally, the grouting ceramsite foam concrete with good performance is obtained. At the same time, by analyzing the influence of various factors on the hemorheology of slurry, the relationship between the hemorheology of slurry and the uniformity of specimen is established, and the relationship between the hemorheology of slurry, grouting pressure and filling rate is expounded. The following conclusions are drawn: 1. In this study, ceramsite foam concrete was prepared by pressure grouting. The foam concrete slurry was filled into the mould filled with ceramsite under the action of pressure, which overcome the disadvantage that ceramsite is easy to float in the traditional mixing process, and obtained the ceramsite foam concrete with uniform quality. 2. The results of orthogonal experiment show that the primary and secondary order of the factors affecting the dry density and 28 d compressive strength of ceramsite foam concrete by grouting method is foam content, fly ash content and water-binder ratio, and the primary and secondary order of influencing uniformity factors is fly ash content, foam content and water-binder ratio. The dry density of ceramsite foam concrete by grouting method decreases with the increase of grouting specimen height. The distribution of dry density in horizontal direction is symmetrical distribution with grouting hole as axial center, and the dry density in axial center position is the largest. 3. The results of further strength optimization study show that the water-binder ratio, fly ash content, foam content and grouting pressure have effects on the compressive strength, specific strength and uniformity of ceramsite foam concrete by grouting method. By adjusting the parameters, the high uniformity grouting ceramsite foam concrete with dry density 781 kg/m3, compressive strength 5.2 MPa, thermal conductivity 0.182 W / (m 路K) is obtained. 4. The yield stress and viscosity of the slurry were characterized by the mobility D and the self-defined S value, respectively. when the slurry mobility D was in the range of 170 脳 220 mm, the uniformity of the finished product was good. The higher the viscosity of the slurry is, the slower the filling rate is when the ratio of water to glue is different and the content of foam is different. When the viscosity of the slurry changes due to the different content of fly ash, the higher the viscosity of the slurry is, the slower the filling rate is. The higher the grouting pressure is, the faster the filling rate is, and the increase range of filling rate decreases with the increase of grouting pressure.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528.2
【参考文献】
相关期刊论文 前10条
1 牛云辉;蒋俊;张玉苹;赵志强;;自流平泡沫水泥性能影响研究[J];新型建筑材料;2016年10期
2 李庆华;高翔;徐世p，
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