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发布时间:2020-01-06 00:00:00
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节 能 与 环 保

铬铁渣新级配优化方法及对砂浆性能的影响
铬铁渣新级配优化方法及对砂浆性能的影响
  • 杭美艳1, 彭雅娟1,郭艳梅2
2020年3期
摘要
引用本文
摘要: 分析了铬铁渣的基本属性、化学成分及物相结构,揭示了铬铁渣的理化性能和级配特点。提出了“分计筛余曲线几何分析”级配优化方法,将风积沙和磨细铬铁渣掺入铬铁渣对其进行级配优化,并通过4种强度等级的砂浆试验进行验证,研究了级配优化性能对砂浆和易性和强度的影响。结果表明,经级配优化的铬铁渣在充当砂浆骨料时,能够改善砂浆和易性、提升砂浆强度。
Abstract:The basic properties, chemical composition and phase structure of ferrochrome slag were analyzed, and the physical and chemical properties and gradation characteristics of ferrochrome slag were revealed. The gradation optimization method of "geometric analysis of residue on sieve" was put forward, and the gradation optimization was carried out by mixing the eolian sand and grinding ferrochrome slag into the ferrochrome slag, and then it was verified by mortar experiments of 4 strength grades, and the effect of gradation optimization on the workability and strength of mortar was studied. The results show that the graded optimized ferrochrome slag can improve the workability and strength of mortar when used as mortar aggregate.
杭美艳,彭雅娟,郭艳梅.铬铁渣新级配优化方法及对砂浆性能的影响[J].混凝土与水泥制品,2020(3):96-99.
HANG M Y,PENG Y J,GUO Y M.A New Gradation Optimization Method of Ferrochrome Slag and Its Effect on the Performance of Mortar[J].China Concrete and Cement Products,2020(3):96-99.
粒化高炉矿渣和CaSO<sub>4</sub>对高强混凝土收缩特性影响试验研究
粒化高炉矿渣和CaSO4对高强混凝土收缩特性影响试验研究
  • 苏 怡1,菅田紀之2
2020年3期
摘要
引用本文
摘  要:基于正交设计方法,在水胶比为0.3的条件下,研究了0、20%、40%的粒化高炉矿渣(GGBFS)和0、1.5%、3.0%、4.5%的CaSO4对高强混凝土凝结时间、收缩性能的影响,并采用XRD分析了水化过程。结果表明,掺入GGBFS和CaSO4能缩短凝结时间;复掺20%GGBFS和CaSO4的高强混凝土抑制自收缩效果优于复掺40%GGBFS和CaSO4的高强混凝土;复掺40%GGBFS和4.5%CaSO4能有效降低高强混凝土的干燥收缩性能。XRD结果表明,掺入GGBFS和CaSO4有利于水泥的水化反应,促进水化产物的生成。 Abstract: Ttheeffectofreplacementrateofground-granulatedblastfurnaceslag(GGBFS)andCaSO4onthesettingtimeandshrinkageperformanceofhighstrengthconcretewithwater-binderratioof0.3wasstudiedbasedontheorthogonaldesignmethod,andthehydrationprocesswasanalyzedbyX-raydiffraction(XRD).TheresultsshowthattheincorporationofGGBFSandCaSO4canshortenthesettingtime,andtheinhibitionofshrinkageofhighstrengthconcretecompoundedwith20%GGBFSandCaSO4isbetterthanthatofconcretewith40%GGBFSandCaSO4.Thehighstrengthconcretewith40%GGBFSand4.5%CaSO4caneffectivelyreduceitsdryingshrinkageperformance.XRDanalysisshowsthattheincorporationofGGBFSandCaSO4isbeneficialtothehydrationreactionofcementandpromotetheformationofhydrationproducts.
苏怡,菅田紀之.粒化高炉矿渣和CaSO4对高强混凝土收缩特性影响试验研究[J].混凝土与水泥制品,2020(3):91-95.
SU Y,SUGATA N.Experimental Study on the Effect of Ground-granulated Blast Furnace Slag and CaSO4 on Shrinkage Characteristics of High Strength Concrete[J].China Concrete and Cement Products,2020(3):91-95.
再生微粉掺量对再生透水混凝土性能的影响研究
再生微粉掺量对再生透水混凝土性能的影响研究
  • 范伟丽1,陈淑平1,陈守开2,3;别亚静2,丁泽霖2
2020年3期
摘要
引用本文
摘  要:基于灰色关联分析法构建以再生骨料透水混凝土抗压强度、劈拉强度、孔隙率、透水系数及质量损失率为评价指标的优选模型,计算得到再生微粉掺量与最优指标集的关联程度。结果表明,0、10%和20%三种再生微粉掺量的灰色关联度较高;掺量为0时,再生骨料透水混凝土的强度最高,10%掺量能够改善其耐磨性能;20%掺量能够显著提高其透水性能。 Abstract: Anoptimalmodelwasestablishedforevaluatingthecompressivestrength,splittingtensilestrength,porosity,permeabilitycoefficientandmasslossrateofrecycledaggregateperviousconcretebasedonthegreyrelationalanalysismethod,andthecorrelationdegreebetweendifferentcontentofrecycledfinepowderandtheoptimalindexsetwascalculated.Theresultsshowthatthegraycorrelationdegreeofthecontentofrecycledfinepowderat0,10%and20%ishigh.Theconcretestrengthofrecycledaggregateperviousconcreteisthebestwhenthecontentofrecycledfinepowderis0,andthewearresistanceofrecycledaggregateperviousconcretecanbeimprovedwhenthecontentofrecycledfinepowderis10%,andthepermeabilityofrecycledaggregateperviousconcretecanbesignificantlyimprovedwhenthecontentofrecycledfinepowderis20%.
范伟丽,陈淑平,陈守开,等.再生微粉掺量对再生透水混凝土性能的影响研究[J].混凝土与水泥制品,2020(3):86-90.
FAN W L,CHEN S P,CHEN S K,et al.Study on the Influence of Recycled Fine Powder Content on the Performance of Recycled Pervious Concrete[J].China Concrete and Cement Products,2020(3):86-90.
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