温轮胶对水泥熟料单矿水化行为的影响
发布时间：2018-07-14 09:40
【摘要】：由于水泥中成分较为复杂,本文主要选用C3A-CaSO4体系,C3S-H2O体系及C2S-H2O体系研究温轮胶对单矿体系水化性能的影响,同时对温轮胶与萘系及聚羧酸减水剂共同加入时,对水泥水化过程的影响进行了探究。通过单矿表面Zeta电位的变化、水化产物生成时间及生成量、水化产物形貌及不同水化时间体系离子浓度的变化,表征温轮胶及温轮胶与减水剂共同掺入对单矿水化行为的影响。研究表明:温轮胶与C3A-CaSO4作用时,温轮胶直接吸附于C3A或AFt表面,通过静电位阻及空间位阻效应,阻碍了钙矾石在C3A表面的沉降,使得AFt悬浮于孔液中或孔隙中,从而影响了钙矾石的结晶及生长。温轮胶与C3S及C2S作用时,由于C3S及C2S显示负电性,因此温轮胶主要通过吸附于硅酸盐矿物表面的Ca2+层,增加了体系的分散性,同时阻碍了水化产物在颗粒表面的沉降阻碍了Ca(OH)2的结晶与生长,从而对硅酸盐矿物的水化产生影响,但由于温轮胶的分散作用,使得C3S及C2S与水接触面积变大,从而使得在水化后期形成的水化产物量增大。温轮胶与萘系减水剂共同作用时,两者之间并未产生明显的竞争吸附作用,温轮胶的掺入方式对水泥水化过程基本未产生影响;温轮胶与聚羧酸减水剂共同作用时,两者之间产生了明显的竞争吸附,其中采用先掺入聚羧酸减水剂,反应2min后再掺入温轮胶的方式,能有效发挥减水剂的减水效果,有利于水化产物的结晶,从而使得水泥砂浆的强度较高。
[Abstract]:Because the composition of cement is more complex, this paper mainly selects C3A-CaSO4 system, C3S-H2O system and C2S-H2O system to study the effect of warm rubber on the hydration property of single ore system, and at the same time, when the warm round glue is added together with naphthalene and polycarboxylic acid water reducer, The influence of cement hydration process was discussed. Through the change of Zeta potential on the surface of single ore, the formation time and amount of hydration products, the morphology of hydration products and the change of ion concentration in different hydration time systems, the effects of the co-incorporation of warm ring glue, warm ring glue and water reducer on the hydration behavior of single ore were characterized. The results show that when the thermoplastic acts with C3A-CaSO4, it is directly adsorbed on the surface of C3A or AFT. The settlement of ettringite on C3A surface is hindered by electrostatic steric resistance and steric resistance, and AFT is suspended in pore solution or pore. Thus, the crystallization and growth of ettringite were affected. Because C 3s and C 2S show negative electric properties when the warm rubber acts with C 3s and C 2S, it increases the dispersity of the system mainly through the adsorption of Ca 2 layer on the surface of silicate minerals. At the same time, the sedimentation of hydration products on the surface of the particles hinders the crystallization and growth of Ca (OH) _ 2, which has an effect on the hydration of silicate minerals, but the contact area between C _ 3s and C _ 2S and water becomes larger due to the dispersion of the thermo-gel. As a result, the amount of hydration products formed in the later stage of hydration is increased. In the process of hydration of cement, there is no obvious competitive adsorption between the two, and the mixing mode of the warm rubber has no effect on the hydration process of cement, and when the temperature wheel glue and polycarboxylic acid superplasticizer act together, There is obvious competitive adsorption between the two, in which the method of mixing polycarboxylic acid water reducer, reaction of 2min, and then adding temperature wheel glue can effectively exert the water reducing effect of water reducer, which is beneficial to the crystallization of hydration products. Therefore, the strength of cement mortar is higher.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ172.1
本文编号：2121247
[Abstract]:Because the composition of cement is more complex, this paper mainly selects C3A-CaSO4 system, C3S-H2O system and C2S-H2O system to study the effect of warm rubber on the hydration property of single ore system, and at the same time, when the warm round glue is added together with naphthalene and polycarboxylic acid water reducer, The influence of cement hydration process was discussed. Through the change of Zeta potential on the surface of single ore, the formation time and amount of hydration products, the morphology of hydration products and the change of ion concentration in different hydration time systems, the effects of the co-incorporation of warm ring glue, warm ring glue and water reducer on the hydration behavior of single ore were characterized. The results show that when the thermoplastic acts with C3A-CaSO4, it is directly adsorbed on the surface of C3A or AFT. The settlement of ettringite on C3A surface is hindered by electrostatic steric resistance and steric resistance, and AFT is suspended in pore solution or pore. Thus, the crystallization and growth of ettringite were affected. Because C 3s and C 2S show negative electric properties when the warm rubber acts with C 3s and C 2S, it increases the dispersity of the system mainly through the adsorption of Ca 2 layer on the surface of silicate minerals. At the same time, the sedimentation of hydration products on the surface of the particles hinders the crystallization and growth of Ca (OH) _ 2, which has an effect on the hydration of silicate minerals, but the contact area between C _ 3s and C _ 2S and water becomes larger due to the dispersion of the thermo-gel. As a result, the amount of hydration products formed in the later stage of hydration is increased. In the process of hydration of cement, there is no obvious competitive adsorption between the two, and the mixing mode of the warm rubber has no effect on the hydration process of cement, and when the temperature wheel glue and polycarboxylic acid superplasticizer act together, There is obvious competitive adsorption between the two, in which the method of mixing polycarboxylic acid water reducer, reaction of 2min, and then adding temperature wheel glue can effectively exert the water reducing effect of water reducer, which is beneficial to the crystallization of hydration products. Therefore, the strength of cement mortar is higher.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ172.1
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