标题: | 蒸气催化湿拌水泥砂浆试体强度发展与蒸气催化模式之关系研究 Strength Growth and Steam-injection Process Model of Cement-sand Paste Hydratrion through Wet-Mix/steam-injection Process |
作者: | 余文仪 Yu, Wen-Yi 彭耀南 Peng, Yaw-Nan 土木工程学系 |
关键字: | 矽砂;托勃莫莱石 |
公开日期: | 1997 |
摘要: | 本研究系以矽砂〔渥太华标准砂〕取代部分的水泥制成水泥砂浆试体,藉由矽砂的高矽质与水泥中的钙于高温蒸气催化的养护条件下,发生热反应,产生高强度的托勃莫莱石(tobermorite)水化生成物。 本试验以高温、高压蒸气催化湿拌水泥砂浆试体,主要变数有:矽砂取代水泥量、温度〔压力〕、催化龄期、预置期。并藉SEM与烧失法求得水化程度、CH含量及硬固后试体的抗压强度,以了解其水化机理与强度发展。 由于高温、高压蒸气催化卜特兰混凝土具有早强与结构致密性的优点,如在此催化条件下若存在有额外的氧化矽,将改良原有之水化产物,而提高强度与耐久性。而水泥砂浆内所添加的矽砂恰可提供为氧化矽的来源,因此以高温高压蒸气催化水泥砂浆,对5cm立方试体而言,最佳压蒸温度、时间与预置期分别为180℃、12小时与2小时,其水泥砂浆抗压强度可达1635kg/cm2以上。 The proposed method is to replase some part of cement in the specimens with silica(Ottawa sand), By dint of the CaO and SiO2 of cement and silica being heat-reaction through high temperature steam-injection process, and that produced high-strength tobermorite. The testing variable includes: the percentage of silica, temperature(pressure), hydration duration and preset. Meanwhile, We gain the hydration degress and cement of Ca(OH)2 through the SEM and method of loss of ignition and compressive strength after hardening to understand hydration Mechanisms and strength growth. Because the Potland Concrete under high-temperature and high-pressure steam has the advantage of early-stage strength and dense-structure; and if there exists extra SiO2 under this catalysis condition, the original hydration produce will be improved, and its strength and durability will be higher. The silica added in cementsand paste just can serve as the source of SiO2, Hence, cement-sand paste through high-temperature and high-pressure steam-injection process. All cement-sand paste cubes(5cm) made by exposing wet mixes to 180℃ steams for 12 hours hydration duration and 2 hours preset developed strength greater than 1635kg/cm2. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT863015016 http://hdl.handle.net/11536/63260 |
显示于类别: | Thesis |