本文選題：脫硫石膏晶須 + 抗折強(qiáng)度�。� 參考：《硅酸鹽通報》2017年04期

【摘要】：以合成脫硫石膏晶須為增強(qiáng)、增韌劑,以水泥砂漿為研究對象,檢測了脫硫石膏晶須摻量(占水泥質(zhì)量百分比為:0、0.5wt%、1wt%、2wt%、3wt%)對水泥砂漿試件不同齡期(3 d、7 d、28 d)抗壓、抗折強(qiáng)度的影響;通過脫硫石膏晶須在堿性水泥基質(zhì)中的分布和微觀形貌的分析,進(jìn)一步探討了脫硫石膏晶須添加水泥基材的增強(qiáng)、增韌機(jī)理。結(jié)果表明:添加1wt%脫硫石膏晶須的水泥砂漿試件的抗折、抗壓強(qiáng)度比未添加晶須試件的分別提高了28.41%、45.65%;脫硫石膏晶須在水泥砂漿試件中能保持原有形貌而穩(wěn)定存在;脫硫石膏晶須在水泥基質(zhì)中微縫處具有的架橋、連接作用阻礙了水泥基質(zhì)中微裂紋的產(chǎn)生與擴(kuò)展,從而提高了水泥砂漿試件的抗折、抗壓強(qiáng)度。
[Abstract]:Taking the synthetic desulphurized gypsum whisker as reinforcement and toughening agent, taking cement mortar as the research object, the effect of the content of desulphurized gypsum whisker (the percentage of desulphurized gypsum whisker to cement mass is 0: 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 The strengthening and toughening mechanism of desulphurization gypsum whisker with cement substrate were discussed by analyzing the distribution and microstructure of desulphurized gypsum whisker in alkaline cement matrix. The results show that the compressive strength of cement mortar specimens added with 1 wt% desulphurization gypsum whisker is 28.41% and 45.65 higher than that without whisker, and the desulphurization gypsum whisker can maintain the original morphology and exist stably in cement mortar. The bridging of desulphurized gypsum whisker at the micro-joint in cement matrix hinders the formation and expansion of microcracks in cement matrix and thus improves the flexural and compressive strength of cement mortar specimens.
【作者單位】： 河南城建學(xué)院;
【基金】：國家自然科學(xué)基金(51674097)
【分類號】：TQ177.62

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 呂鋼;李s，

本文編號：1834286