注漿法制備陶粒泡沫混凝土實驗研究
發(fā)布時間：2019-06-26 21:31
【摘要】：陶粒泡沫混凝土是一種具有保溫隔熱、不燃、輕質(zhì)和高強等優(yōu)良特性的新型無機保溫材料,能較好地滿足現(xiàn)代建筑對節(jié)能、安全性和可持續(xù)發(fā)展的要求。論文提出了注漿法陶粒泡沫混凝土的制備方法,通過正交實驗和性能優(yōu)化,分析了水膠比、粉煤灰摻量、泡沫摻量和注漿壓力等因素對注漿法陶粒泡沫混凝土性能和均勻性的影響,最終獲得了性能良好的注漿法陶粒泡沫混凝土。同時,論文通過分析各因素對漿體流變性的影響,建立了漿體流變性與試件均勻性的關(guān)系,闡明了漿體流變性、注漿壓力與填充速率的關(guān)系�？偨Y(jié)得出以下結(jié)論:1.本研究利用壓力注漿制備陶粒泡沫混凝土,泡沫混凝土漿體在壓力作用下填充到自然堆滿有陶粒的模具中,克服了傳統(tǒng)攪拌工藝中陶粒易上浮的缺點,得到品質(zhì)均勻的陶粒泡沫混凝土。2.正交實驗的研究結(jié)果表明,影響注漿法陶粒泡沫混凝土干密度和28 d抗壓強度因素的主次順序:泡沫摻量、粉煤灰摻量和水膠比,影響均勻性因素的主次順序:粉煤灰摻量、泡沫摻量和水膠比。注漿法陶粒泡沫混凝土的干密度隨著注漿試件高度的增加而減小,干密度在水平方向上的分布以注漿孔為軸心對稱分布,軸心位置的干密度最大。3.進一步的強度優(yōu)化研究結(jié)果表明,水膠比、粉煤灰摻量、泡沫摻量和注漿壓力對注漿法陶粒泡沫混凝土的抗壓強度、比強度和均勻性均有影響。通過調(diào)整參數(shù),最終得到干密度781 kg/m3、抗壓強度5.2 MPa、導熱系數(shù)0.182 W/(m·K)的高均勻性注漿法陶粒泡沫混凝土。4.研究利用流動度D和自定義的S值分別表征漿體的屈服應力和粘度,當漿體流動度D在170~220 mm范圍時制備的成品均勻性好。不同水膠比以及不同泡沫摻量下表現(xiàn)為,漿體粘度越大,填充速率越慢。由于粉煤灰摻量不同引起粘度變化時,漿體在碰壁后才表現(xiàn)出漿體粘度越大,填充速率越慢的規(guī)律。注漿壓力越大,填充速率也越快;填充速率的增長幅度隨著注漿壓力的增大而減小。
[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.
【學位授予單位】：浙江工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：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.
【學位授予單位】：浙江工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU528.2
【參考文獻】
相關(guān)期刊論文 前10條
1 牛云輝;蔣俊;張玉蘋;趙志強;;自流平泡沫水泥性能影響研究[J];新型建筑材料;2016年10期
2 李慶華;高翔;徐世p，
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