【摘要】：由于水泥中成分較為復雜,本文主要選用C3A-CaSO4體系,C3S-H2O體系及C2S-H2O體系研究溫輪膠對單礦體系水化性能的影響,同時對溫輪膠與萘系及聚羧酸減水劑共同加入時,對水泥水化過程的影響進行了探究。通過單礦表面Zeta電位的變化、水化產(chǎn)物生成時間及生成量、水化產(chǎn)物形貌及不同水化時間體系離子濃度的變化,表征溫輪膠及溫輪膠與減水劑共同摻入對單礦水化行為的影響。研究表明:溫輪膠與C3A-CaSO4作用時,溫輪膠直接吸附于C3A或AFt表面,通過靜電位阻及空間位阻效應(yīng),阻礙了鈣礬石在C3A表面的沉降,使得AFt懸浮于孔液中或孔隙中,從而影響了鈣礬石的結(jié)晶及生長。溫輪膠與C3S及C2S作用時,由于C3S及C2S顯示負電性,因此溫輪膠主要通過吸附于硅酸鹽礦物表面的Ca2+層,增加了體系的分散性,同時阻礙了水化產(chǎn)物在顆粒表面的沉降阻礙了Ca(OH)2的結(jié)晶與生長,從而對硅酸鹽礦物的水化產(chǎn)生影響,但由于溫輪膠的分散作用,使得C3S及C2S與水接觸面積變大,從而使得在水化后期形成的水化產(chǎn)物量增大。溫輪膠與萘系減水劑共同作用時,兩者之間并未產(chǎn)生明顯的競爭吸附作用,溫輪膠的摻入方式對水泥水化過程基本未產(chǎn)生影響;溫輪膠與聚羧酸減水劑共同作用時,兩者之間產(chǎn)生了明顯的競爭吸附,其中采用先摻入聚羧酸減水劑,反應(yīng)2min后再摻入溫輪膠的方式,能有效發(fā)揮減水劑的減水效果,有利于水化產(chǎn)物的結(jié)晶,從而使得水泥砂漿的強度較高。
[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.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ172.1

【參考文獻】

相關(guān)期刊論文 前10條

1 王海英;谷曉慶;李詩吉;王曉陽;陳彥廣;柳艷修;;不同顯色體系利用分光光度法測定鈣鎂離子含量比較[J];化學工業(yè)與工程技術(shù);2014年03期

2 劉金芝;周棟梁;江姜;冉千平;劉加平;;具有緩釋作用的聚羧酸分散劑的制備及機理研究[J];功能材料;2013年S2期

3 趙明;呂少一;;羥丙基甲基纖維素生產(chǎn)技術(shù)與市場發(fā)展現(xiàn)狀[J];纖維素科學與技術(shù);2012年03期

4 易聰華;湯潛潛;黃欣;邱學青;;聚羧酸減水劑在水泥顆粒表面的吸附行為[J];化工學報;2012年08期

5 楊守磊;伍勇華;李國新;;高效減水劑對鈣礬石結(jié)晶形成影響的研究進展[J];四川建筑科學研究;2012年03期

6 劉才林;任先艷;楊海君;楊軍校;;幾種復合減水劑的分散效應(yīng)與作用機理[J];建筑材料學報;2011年01期

7 張國政;唐林生;;醚型聚羧酸減水劑的作用機理研究[J];天津化工;2011年01期

8 詹鎮(zhèn)峰;李從波;陳文釗;;纖維素醚的結(jié)構(gòu)特點及對砂漿性能的影響[J];混凝土;2009年10期

9 王恒昌;房滿滿;陳春泉;林東;文梓蕓;;萘系與聚羧酸系減水劑對水泥基材料性能的影響[J];混凝土;2009年03期

10 曾曉輝;隋同波;宓振軍;范磊;;電阻率法測定水泥的凝結(jié)時間[J];水泥;2009年01期

相關(guān)博士學位論文 前1條

1 王子明;“水泥—水—高效減水劑”系統(tǒng)的界面化學現(xiàn)象與流變性能[D];北京工業(yè)大學;2006年

，

本文編號：2121247