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以自制的钢渣水泥(钢渣用量达到60%)为主要的胶凝材料,利用双氧水分解反应的化学发泡法制备发泡水泥,分别研究发泡剂掺量、催化剂二氧化锰、发泡时的搅拌水温、水胶比及玻璃纤维对发泡过程及制备的发泡水泥性能的影响。实验结果表明:催化剂二氧化锰对双氧水分解反应的速率影响较大,加入催化剂后的发泡速率成阶段性变化,但发泡后的最终体积趋于一致;当双氧水用量为4%时,发泡水泥7 d的抗压强度为0.61 MPa,干密度达到556 kg·m-3;发泡时搅拌水温控制在30℃时,发泡过程基本在24 min内结束,发泡效果较好;发泡水泥的抗压强度、干密度随着水胶比的增加而降低;玻璃纤维对发泡水泥孔结构的形成有影响,当玻璃纤维量为0.4%时,其在0~1 mm、1~2 mm内分布的孔较多,整体上孔分布较为均匀,7 d的抗压强度达到0.72 MPa。
Using homemade steel slag cement (60% of steel slag) as the main cementitious material, foaming cement was prepared by the chemical foaming method of hydrogen peroxide decomposition. The effects of the amount of foaming agent, manganese dioxide catalyst, Stirring water temperature, water-cement ratio and glass fiber foaming process and the preparation of foam cement performance. The experimental results show that the catalyst manganese dioxide has a significant effect on the rate of hydrogen peroxide decomposition, and the foaming rate after the addition of catalyst gradually changes, but the final volume after foaming tends to be consistent. When the amount of hydrogen peroxide is 4% The compressive strength of foam cement for 7 d was 0.61 MPa and the dry density reached 556 kg · m-3. When the temperature of stirring water was controlled at 30 ℃, the foaming process ended within 24 min and the foaming effect was better. The compressive strength and dry density of foam cement decrease with the increase of water / binder ratio. Glass fiber affects the formation of foam cement pore structure. When the amount of glass fiber is 0.4% There are many holes distributed within 2 mm, and the holes are evenly distributed on the whole. The compressive strength reaches 0.72 MPa at 7 days.