节能降碳_2023_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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节能降碳

高性能防辐射混凝土的制备及性能研究

杜国伟，胡德华，刘向坤，张伟

2023年第6期

摘要

引用本文

摘要：分别以赤铁矿、褐铁矿作为重骨料，并掺入适量铁砂，制备了高性能防辐射混凝土，对比研究了重骨料的类型对防辐射混凝土工作性、力学性能、表观密度、屏蔽性能和耐高温性能的影响。结果表明：掺赤铁矿、褐铁矿防辐射混凝土的工作性、力学性能、表观密度和耐高温性能均满足相关工程要求；赤铁矿防辐射混凝土中H、O元素的等效质量密度不满足工程要求，Fe元素的等效质量密度满足工程要求；褐铁矿防辐射混凝土中H、O、Fe元素的等效质量密度均满足工程要求，屏蔽性能较好。综合考虑各项性能，推荐采用褐铁矿作为防辐射混凝土的重骨料。 Abstract: Taking hematite and limonite as the heavy aggregates, and adding appropriate content of iron sand, the high performance radiation shielding concrete was prepared. The influence of the type of heavy aggregates on the workability, mechanical properties, apparent density, shielding performance and high temperature resistance of radiation shielding concrete was studied. The results show that the workability, mechanical properties, apparent density and high temperature resistance of hematite and limonite radiation shielding concrete meet the relevant engineering requirements. The equivalent mass density of H and O elements in hematite radiation shielding concrete does not meet the engineering requirements, but the equivalent mass density of Fe element meets the engineering requirements. The equivalent mass density of H, O and Fe elements in the limonite radiation shielding concrete meets the engineering requirements, and the shielding performance is good. Considering various properties comprehensively, it is recommended to use limonite as the heavy aggregate of radiation shielding concrete.

杜国伟,胡德华,刘向坤,等.高性能防辐射混凝土的制备及性能研究[J].混凝土与水泥制品,2023(6):90-93. DU G W,HU D H,LIU X K,et al.Preparation and Performance Study of High Performance Radiation Shielding Concrete[J].China Concrete and Cement Product,2023(6):90-93.

NaOH和聚合物乳液复合改性橡胶混凝土的性能研究

苏有文，杨钦淞，高梦秋

2023年第6期

摘要

引用本文

摘要：为了研究NaOH和聚合物乳液复合改性橡胶混凝土的性能，对橡胶颗粒采用浓度为4%的NaOH溶液进行12 h浸泡处理，然后将其等体积取代9.5%的河砂，并掺入不同种类（丁苯乳胶、合成树脂、乳化沥青）和掺量（1%、2%、3%、4%、5%）的聚合物乳液对橡胶混凝土（CRC）进行复合改性，研究了聚合物乳液的种类和掺量对CRC力学、抗冻性能的影响。结果表明：随着聚合物乳液掺量的增加，试件的抗压、抗折强度先增大后减小，其中，2%合成树脂对试件抗压、抗折强度的提高效果最好；对于CRC的抗冻性能，3种聚合物乳液的最佳掺量均为3%，其中，丁苯乳胶、合成树脂对CRC抗冻性能的改善效果相对较好，乳化沥青的改善效果相对较差。 Abstract: In order to study the performance of the NaOH and polymer lotion composite modified crumb rubber concrete, the rubber particles were soaked in NaOH solution with concentration of 4% for 12 hours, and then replaced river sand with equal volume(9.5%) of rubber particles, and the different types (styrene butadiene latex, synthetic resin, emulsified asphalt) and contents (1%, 2%, 3%, 4%, 5%) of polymer lotion were added to crumb rubber concrete (CRC). The effects of type and content of polymer lotion on the mechanical properties and frost resistance of CRC were studied. The results show that with the increase of polymer lotion content, the compressive strength and flexural strength of the specimen first increase and then decrease. Among them, 2% synthetic resin has the best effect on improving the compressive strength and flexural strength. For the frost resistance of CRC, the optimal content of all three polymer lotions is 3%. Among them, styrene butadiene latex and synthetic resin have relatively good improvement effects on the frost resistance of CRC, while emulsified asphalt has relatively poor improvement effects.

苏有文,杨钦淞,高梦秋.NaOH和聚合物乳液复合改性橡胶混凝土的性能研究[J].混凝土与水泥制品,2023(6):94-97. SU Y W,YANG Q S,GAO M Q.Study on Performance of NaOH and Polymer Lotion Composite Modified Crumb Rubber Concrete[J].China Concrete and Cement Product,2023(6):94-97.

石油焦气化渣在蒸压加气混凝土砌块中的应用研究

刘珍，程顺义

2023年第6期

摘要

引用本文

摘要：采用石油焦气化渣作为硅质原料制备了蒸压加气混凝土砌块，研究了石油焦气化渣的掺量以及减水剂的类型、掺量和掺入顺序对蒸压加气混凝土砌块干密度和抗压强度的影响，并对掺石油焦气化渣蒸压加气混凝土砌块的生产线应用进行了分析介绍。结果表明：采用石油焦气化渣可制备出强度等级A3.5、密度等级B05或B06的蒸压加气混凝土砌块，且石油焦气化渣的掺量可高达50%；掺入适量减水剂可显著降低掺石油焦气化渣蒸压加气混凝土砌块的水料比，提高干密度和抗压强度；固体减水剂的减水效果比液体减水剂的减水效果好；将固体减水剂与水混合后掺入比直接掺入固体减水剂的效果好。 Abstract: Autoclaved aerated concrete blocks were prepared by using petroleum coke gasification slag as siliceous raw material, and the effects of the content of petroleum coke gasification slag, the type, content and incorporation order of water reducing agent on the dry density and compressive strength of autoclaved aerated concrete blocks were studied. The production line application of autoclaved aerated concrete blocks mixed with petroleum coke gasification slag was analyzed and introduced. The results show that autoclaved aerated concrete blocks with strength grade of A3.5, density grade of B05 or B06 can be prepared by using petroleum coke gasification slag, and the content of petroleum coke gasification slag can be as high as 50%. The water material ratio of autoclaved aerated concrete blocks mixed with petroleum coke gasification slag can be significantly reduced, and the dry density and compressive strength can be improved by adding appropriate content of water reducing agent. The water reducing effect of solid water reducing agent is better than that of liquid water reducing agent. The effect of mixing solid water reducing agent with water is better than that of directly adding solid water reducing agent.

刘珍,程顺义.石油焦气化渣在蒸压加气混凝土砌块中的应用研究[J].混凝土与水泥制品,2023(6):98-102. LIU Zh,CHENG S Y.Study on Application of Petroleum Coke Gasification Slag in Autoclaved Aerated Concrete Blocks[J].China Concrete and Cement Product,2023(6):98-102.

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