地聚物多孔材料的制备与性能研究

发布时间：2018-09-09 14:29

【摘要】：为了解决地聚物多孔材料轻质与高强难以取得一致性的问题,本文以工业废渣粉煤灰、矿渣、钢渣等为主要原料,水玻璃为激发剂,双氧水为发泡剂,利用化学发泡法分别对粉煤灰基地聚物多孔材料、粉煤灰-矿渣地聚物多孔材料、粉煤灰-矿渣-钢渣地聚物多孔材料这三种体系的多孔材料进行了轻质高强的制备技术及其性能研究。本文首先采用了正交试验方法,通过调节水玻璃掺量、水玻璃模数、养护温度、养护时间等因素制备出抗压强度高达44.38MPa的粉煤灰基地聚物材料,在此基础上,以高强度,低表观密度作为目标值,采用双氧水发泡,对影响粉煤灰基地聚物多孔材料表观密度和强度等因素进行了试验研究,对双氧水发泡剂及辅助稳泡材料等进行了优选,制备出粉煤灰基地聚物多孔材料。试验结果表明:当H2O2掺量为2.0%,硬脂酸钙掺量为1.0%,MnO2掺量为0.3%,制备出的粉煤灰基地聚物多孔材料抗压强度为1.52MPa、表观密度为510kg/m3。其次,利用超细矿渣粉的独特性,将粉煤灰/矿渣比例作为影响因素,对粉煤灰/矿渣比例进行优选试验研究,制备出粉煤灰-矿渣地聚物多孔材料。试验结果表明:当粉煤灰/矿渣比例为1∶1,H2O2掺量为2.0%,硬脂酸钙掺量为1.0%,Mn O2掺量为0.3%,制备出的粉煤灰-矿渣地聚物多孔材料抗压强度达到5.9MPa、表观密度为557kg/m3。最后,将粉煤灰、矿渣、钢渣进行复合,采用了均匀设计试验方法,对影响粉煤灰-矿渣-钢渣地聚物多孔材料表观密度和强度等因素进行试验研究,对粉煤灰/矿渣/钢渣复合比例、双氧水发泡剂及辅助稳泡材料等进行了优选,制备出粉煤灰-矿渣-钢渣地聚物多孔材料。试验结果表明:当粉煤灰/矿渣/钢渣比例为1∶3∶1,H2O2掺量2.5%,硬脂酸钙掺量0.5%,MnO2掺量为0.5%,可制备出抗压强度达到5.1MPa、表观密度为650kg/m3的粉煤灰-矿渣-钢渣地聚物多孔材料。另外,采用压汞仪、XRD、SEM、低场核磁共振技术等微观测试手段对地聚物多孔材料进行了微观试验研究,并分析了地聚物多孔材料的抗压强度和表观密度与孔结构之间的关系。
[Abstract]:In order to solve the problem that it is difficult to achieve consistency between light weight and high strength of polymer porous materials, the industrial waste slag, fly ash, slag and steel slag are used as main raw materials, water glass as activator, hydrogen peroxide as foaming agent, etc. By chemical foaming method, the porous materials of fly ash base polymer and fly ash slag polymer were studied. The preparation technology and properties of three kinds of porous materials, fly ash, slag and steel slag polymer, were studied in this paper. In this paper, firstly, orthogonal test method is used to prepare fly ash base polymer materials with compressive strength of up to 44.38MPa by adjusting water glass content, water glass modulus, curing temperature, curing time and so on. On this basis, high strength is obtained. As the target value, the factors affecting the apparent density and strength of porous materials based on fly ash, such as hydrogen peroxide foaming agent and auxiliary foam stabilizer, were studied. The porous material of fly ash base polymer was prepared. The experimental results show that when the content of H2O2 is 2.0 and calcium stearate is 1.0 and MNO _ 2 is 0.3, the compressive strength and apparent density of the porous material are 1.52MPa and 510kg / m3 respectively. Secondly, by using the particularity of ultrafine slag powder and taking the ratio of fly ash / slag as the influencing factor, the optimum selection of the ratio of fly ash and slag is studied, and the porous material of flyash and slag aggregates is prepared. The experimental results show that when the ratio of fly ash to slag is 1: 1 and H2O2 is 2.0, calcium stearate is 1.0 and mn O _ 2 is 0.3, the compressive strength of the prepared porous material is 5.9 MPA, and the apparent density is 557 kg / m ~ 3. Finally, the factors affecting the apparent density and strength of porous materials such as fly ash, slag and steel slag were studied by uniform design test method. The composite ratio of fly ash / slag / steel slag, hydrogen peroxide foaming agent and auxiliary foaming material were selected to prepare the porous material of fly ash, slag and steel slag. The experimental results show that when the ratio of fly ash to slag / steel slag is 1: 3: 1H _ 2O _ 2 2.5, calcium stearate 0.5 and MnO2 0.5, the compressive strength is 5.1 MPA and the apparent density is 650kg/m3, the porous material of fly-ash, slag and steel slag geopolymer can be prepared. In addition, the microcosmic test of polymer porous materials was carried out by means of mercury porosimeter XRDX SEM and low field nuclear magnetic resonance technique. The relationship between compressive strength, apparent density and pore structure of polymer porous materials was analyzed.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB383.4

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