摘 要：研究了燃煤电厂两大固体废物脱硫石膏和粉煤灰在空气自然养护条件下胶结反应特性，以粉煤灰改性未经煅烧脱硫石膏配制的新型石膏基胶结材，对影响脱硫石膏-粉煤灰胶结材的碱激发各因素进行了试验研究，得出了各因素单独作用时胶结材强度的发展规律。在此基础上，通过正交试验得到脱硫石膏-粉煤灰胶结材的最佳复合激发剂配比。此外，还研究了各激发剂对胶结材的影响机理及胶结材水化硬化机理。 Abstract: The solidifying reaction characteristics between two major solid wastes in coal-fired power plants, desulphogypsum and fly ash, are studied, while being naturally cured in the air. The factors affecting alkali excitation of desulphogypsum-fly ash cementitious material are researched by experiment according to the new gypsum cementitious material prepared by fly ash modifying non-calcined desulphogypsum. And the strength laws of desulphogypsum-fly ash cementitious material are carried out when each factor acts on the system alone. On the basis of this, by orthogonal experiment, the optimum proportion of composite activator of desulphogypsum-fly ash cementitious materiasl is obtained. Besides, the affecting mechanisms of exciting agents on cementitious material and the rule of hydration and hardening of cementitious material are analyzed and discussed.

摘  要：以富镁尾矿为原料，经适宜工艺制备了新型膨胀材料，并研究了掺不同品种膨胀材料的水泥砂浆在不同龄期的力学性能以及在不同养护条件下的膨胀性能。结果表明，升高水化温度对水泥砂浆前期膨胀速率的增加比较明显，对水化后期影响较小；CaO含量高的膨胀材料早期膨胀率大，后期膨胀率小；当膨胀材料掺量在4%～6%时，水泥砂浆强度与变形可达到较好的平衡；新型膨胀材料具有持续稳定的膨胀性能，不存在无限膨胀和回缩现象。Abstract：Novelexpansiveagentsarepreparedbyusingrichmagnesiumtailingsthroughappropriatetechnology.Themechanicalpropertiesofmortarmixedwithdifferentexpansiveagentsunderdifferent agesandtheexpansionpropertiesunderdifferentcuringconditionsareinvestigated.Resultsshowthatattheearlyage,theexpansionspeedincreasesobviouslywiththeincreaseofhydrationtemperature,butatthelaterage,thereisnoobviouseffectontheincreaseofexpansionspeed.Whentheamountofexpansiveagentsisincertaincircumstance,thehigherCaO,thehighertheearlyexpansionratioisandthelowerthelateexpansionis.Whenthedosagesofexpansiveagentsare4%～6%,thedeformationandstrengthofthemortarspecimenareinabetterbalance.Theexpansioncurveshowsthattheexpansionpropertiesoftheseexpansiveagentsarestablethroughthewholecourseofhydration,andthereisnoexcessiveexpansionandretraction.

摘 要：通过南水北调干渠工程实例，分析了渠道边坡混凝土衬砌施工的具体情况，研究了喷砂防滑型（XPS）挤塑保温板的防滑性能，提出了渠道边坡混凝土衬砌施工质量提升的解决方案。 Abstract：Through the example of main canal engineering of South-to-North Water Transfer, the detailed situation of concrete lining construction in the side slope of canals is analyzed. The antiskid property of spray sand antiskid type (XPS) crowded plastic insulation board is studied, and the solutions on improving the quality of concrete lining construction in the side slope of canals are proposed.

摘 要：研究了利用建筑垃圾、采用免烧免蒸工艺，生产免烧砖的技术。结果表明，建筑垃圾可全组分利用，且利用率可高达80%以上；不同使用年限的建筑垃圾对胶结材料的性能影响不大。 Abstract: Non-burned bricks can be made by construction wastes through non-burning and non-steaming process. The results show that the construction wastes can be all components utilization, and the utilization rate is up to over 80%. The effects of construction wastes with different service life on the performances of cementing materials are less.

摘 要：某学校宿舍楼梁、板、柱构件混凝土表面出现爆裂现象，通过对爆裂部分砂浆进行化学分析和混凝土安定性试验，确定混凝土爆裂是由于在混凝土拌制过程中掺入的钢渣中过烧氧化钙、氧化镁发生水化反应，体积膨胀造成的。 Abstract: The blowout phenomenon happened on the surface of concrete beams, plates and columns of one school dormitory building. Through the chemical analysis of the blowout part mortar and the stability test of concrete, the concrete blowout is caused by the volume expansion of the burned CaO, MgO of steel slag happening hydration during the concrete mixing process.

摘 要：用机制砂代替天然砂配制干混砂浆，可利用矿山尾矿作原料让尾矿石变废为宝，有效解决了尾矿环境污染问题；用机制砂中的石粉部分代替水泥不仅可以改善砂浆的性能，而且石粉部分替代水泥可以减少成本、节约资源。因此，研究石粉部分替代水泥对机制砂干混砂浆力学性能的影响具有重要的理论和经济价值。本文通过室内试验，研究了在不同替代率下石粉代替水泥对不同强度等级（M5,M10,M15,M30）的砌筑干混砂浆的7d和28d的抗压强度和抗折强度等力学性能的影响。试验结果表明，各强度等级的机制砂干混砂浆的7d和28d的抗压强度和抗折强度随石粉替代率的增加而降低，当替代率达到30%时，其抗压强度和抗折强度降低的最为明显。 Abstract: Using manufactured-sand replacing natural sand to prepare dry-mixed mortar can make the use of tailings and effectively solve the environment pollution of tailings. Stone powder of manufactured-sand partially replacing cement can not only improve the performances of dry-mixed mortar, but also reduce costs and save resources. Therefore, studying the effects of stone powder partially replacing cement on mechanical properties of dry-mixed mortar has important theoretic and economical values. In this paper, through the laboratory test, the influences of stone powder replacing cement with different replacing rates on 7d and 28d compressive strength and flexural strength of masonry dry-mixed mortar with different strength grades (M5, M10, M15, M30) are studied. The experimental results show that when the stone powder replacing rate increases, the 7d and 28d compressive strength and flexural strength of dry-mixed mortar with manufactured-sand with different strength grades will decrease, and when the stone powder replacing rate is 30%, the compressive strength and flexural strength decrease most obviously.