粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIATION 2014No.4 专题研究 再生骨料透水混凝上体积法配比设计关键参数的优化选择* Optimal Selection for Key Parameters of Porous Pervious Concrete made from Recycled aggregates's Mix Design with Method of Volume 龚平,张高波,周余 (长江大学城市建设学院,湖北荆州434023) 摘要:以再生骨料配制的透水生态混凝土为研究对象用体积法进行配合比设计并调整不同的配比参数研究保 证再生骨料配制透水生态混凝土透水性和强度的最佳配比参数,并比较再生骨料与天然骨料配比设计中参数选择的异同。 关键词:再生骨料;透水混凝土;体积法配比设计;抗压强度;透水系数 中图分类号:TU528.0 文献标识码:A 文章编号:1005-8249(2014)04-0003-03 Gong Ping' ,Zhou Yu Civil Construction College of Yangtze University ,Hubei Jingzhou 434000 ,China Abstract :The porous pervious concrete made from recycled aggregates was selected as the object of study .With method of volume ,the mix design parameters of various ratios were adjusted to study out the optimal mix parameters to obtain good permeability and enough strength .The similarities and differences of the optimal mix parameters' selection between the concrete made of recycled aggregate and natural aggregate was pared . Key words :Recycled :Porous pervious concrete ;Mix design with method of volume Compressive strength ;Permeability coefficient 透水混凝土配合比设计常用方法有质量法、体积 1原材料及试验方法 法和比表面法,再生骨料配制透水生态混凝土成熟经 验较少,不适用利用经验图表的质量法,比表面积法以 1.1原材料 假设骨料颗粒为球...
粉煤灰综合利用 2011N.2 FLY ASH COMPREHENSIVE UTILIZATION 试验 再生骨料中粉料对水泥性能的影响 Effect of Powders in Recycled Aggregats on Cement Performances 侯云芬陈家珑 (北京建筑工程学院材料系,北京100044) 摘要:利用建筑废弃物生产再生骨料时会产生一定量的粒径小于0.075mm的再生粉料。本文从两类有代表性的 再生骨料中筛取再生粉料,将其按照5%10%15%及20%的质量比例掺入水泥中,发现两类再生粉料使水泥的标准稠 度用水量增大,但不会影响凝结时间和安定性;掺入再生粉料后使水泥的强度下降,但当再生粉料掺量高达25%时,水 泥的强度仍然满足其它硅酸盐水泥32.5强度等级的要求。 关键词:再生骨料粉料水泥建筑废弃物性能 中图分类号:TU528.0 文献标识码:A 文章编号:1005-8249(2011)02-0016-04 Houyunfen Chenjialong ( Dep.Materials ,Beijing institute of civil engineering and architecture ,Beijing ,100044 ) Abstract :A certain amount of powders whose particle size is less than 0 .075mm would be formed when aggregates are produced using construction .Two typess recycled powders which are gained by sieving the recycled aggregates are added in cement according to ratio of 5% ,10% .15% and 20% .It is showed that the recycled powders increase the amount for standard consisteney ,but do not effect the setting time and soundness .The recycled decrease the strengths cement ,but the strengths meet the requirements for 32 .5 strength grade of pound Portland cement when the dosages reach 25% Key words :recycled aggregate :powders ;cement ;construction waste...
粉煤灰综合利用 2016o.1 FLY ASH COMPREHENSIVE UTILIZATION 试验与应用 再生细骨料品质和取代率对再生混凝土强度的影响 Influence of Quality and Replacement Ratio of Recycled Fine Aggregate on Mechanical Properties of Recycled Concrete 莫建,李秋义,岳公冰,韩帅,王晓飞 (青岛理工大学,蓝色经济区工程建设与安全协同创新中心,青岛266033) 摘要:根据《混凝土和砂浆用再生细骨料》(GB/T25176-2010),废弃混凝土经简单破碎制得Ⅱ类再生细骨料,经 二次颗粒整形制得1类再生细骨料。在五种不同胶凝材料用量的情况下,采用再生细骨料取代(中=0、25%、50%、75%、 100%)天然骨料,通过实验研究再生细骨料品质和取代率对再生混凝土3d、14d、28d和90d抗压强度的影响。结果显 示Ⅱ类再生细骨料混凝土的力学性能随着中的增加而降低,较普通混凝土降低12.8%;类再生细骨料混凝土的力学 性能随着中的增加而提高,较普通混凝土提高25.1%。 关键词:粉煤灰;夯实水泥土无侧限抗压强度 中图分类号:TU528.0 文献标识码:A 文章编号:1005-8249(2016)01-0012-04 Mo Jian ,Li Qiu-yi ,Yue Gong-bing ,Han Shuai ,Wang Xiao-fei ( CollaborativeInnovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao Technological University ,Qingdao 266033 ,Chin ) Abstract :According Recycled Fine aggregate for concrete and mortar )(GB/T25176-2010),the waste concrete is simply crushed to class-ll recycled fine aggregate ,twice reshaped to - Irecycled fine aggregate .In the condition of five different dosage of cementitious materials ,using recycled fine aggregate to replace (= 0,25% ,50% ,75% ,100% )natural aggregate ,the influence of quality and repl...
粉煤灰综合利用 2015N.6 FLY ASH COMPREHENSIVE UTILIZATION 专题研究 再生细骨料及矿物掺合料对再生砂浆强度及微观结构的影响* The Influence of The Recycled Fine Aggregate and Mineral Admixture on the Microstructure and Strength of Recycled Motar 李滢,代大虎,龚志起 (青海大学土木工程学院,西宁810016) 摘要将不同来源的2种再生细骨料及矿物掺合料以不同的掺配方式掺入砂浆中研究了再生砂浆强度及微观 结构的变化。研究发现在水泥砂浆中掺入不同来源的再生细骨料后,随着取代率的变化再生砂浆强度表现出的变化趋 势不同。在再生细骨料取代率为50%的情况下同时在水泥砂浆中掺加矿物掺合料,无论是单掺粉煤灰还是复掺粉煤灰 和硅灰,再生砂浆在水化早期的强度均有明显下降,到了28d时强度均基本接近。从微观结构来看,掺加再生细骨料后, 水泥石内部结构中有比较大的孔隙和微裂纹,但如果同时加入矿物掺合料,水泥凝胶体内部的孔隙减少,结构趋于致密。 关键词:再生细骨料再生砂浆水泥石;矿物掺合料;再生细骨料取代率 中图分类号:TU52.09 识码:A文章编号:1005-8249(2015)06-000 Li Ying ,Dai Dahu ,Gong Zhiqi ( Schoolof Civil Engineering ,Qinghai University ,Xining ,810016 ) Abstract :By mixing two series recycled fine aggregates derived from different origins and mineral admixtures into cement mortar ,the influence on the microstructure and strength of recycled mortar is studied .It is demonstrated that with the increasing of recycled fine aggregate replacement rate ,the change of the strength of the mortar with this two series recycled fine aggregates are different .When the recycled fine aggregate replacement rate is 50% ,mixed fly ash and silica fume into recycled mortar separately an...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2011No.3 再生砂对砂浆的施工和易性及抗压强度的影响 The Influence of Recycled Sand on Construction Workability and Compressive Strength of Mortar 段邦政,鄢朝勇,朱攀,肖枭,孙少君 (襄樊学院建筑工程学院,湖北襄樊441003) 摘要:将湖北襄阳地区的建筑垃圾粉碎筛分得到再生砂,以再生砂部分或全部取代建筑砂浆中的天然砂,用粉煤 灰作为掺加料,制作再生砂浆,研究再生砂对砂浆和易性及抗压强度的影响。在砂浆流动性基本相同的情况下,随再生 砂掺量增加,砂浆的用水量明显增大、保水性趋于提高。再生砂浆在再生砂取代量为40%时获得良好的骨料级配,强度 提高。 关键词:建筑垃圾;再生砂浆;和易性抗压强度 中图分类号:TU57*8.1 文献标识码:A 文章编号:1005-8249(2011)03-0017-03 Duan Bang-zheng ;Yan Chao-yong ;Zhu Pan ;Xiao xiao ;Sun Shaojun School of Civil Engineering and Architecture ,Xiangfan University ,Xiangfan 441003 ,Hubei ,PRC ) Abstract :Construction waste in HuBei Xiangyang region can be by screening the crushed sand ,part or all of the recycled sand to replace natural sand mortar ,with ash extract as admixture to reeycled aggregate mortar .It researched on the inlluence of recycled sand on mortar workability and pressive strength .Under the same cireumstances of mortar liquidity ,with the recycled sand content increased ,mortar's retention tends to increase and water's dosage tends to increase too .When the recycled sand replace 40% of the recycled aggregate mortar ,the mortar gets the good aggregat...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2016N0.3 试验与应用 再生微粉对混凝土的工作性及力学性能的影响研究* Influence of Recycled Powders on Workability and Mechanical Properties of Concrete 张修勤,李秋义,谢汝朋,王忠星,曹瑜斌 (蓝色经济区工程建设与安全协同创新中心,青岛理工大学,山东青岛266033) 摘要:再生微粉是废弃混凝土颗粒整形过程中产生的细小粉状颗粒,其对环境以及人的身体健康造成威胁.本 文研究其基本性能,并将其作为矿物掺合料制备混凝土,研究再生微粉不同掺量时对混凝土的工作性和抗压强度的影 响,研究表明:再生微粉掺量的增加使得混凝土的需水量增大,因此其对混凝土的工作性产生不利影响;对于混凝土的力 学性能,在再生微粉的掺量为1%以内,混凝土的抗压强度减小幅度较小,当掺量较大时,混凝土的抗压强度大幅减小. 关键词:再生微粉;混凝土;工作性;抗压强度 中图分类号:TU521.2*5 文献标识码:A 文章编号:1005-8249(2016)03-0003-04 Zhang Xiuqin Li Qiuyi Xie Rupeng Wang Zhongxing Cao Yubin (Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone School of Civil Engineering Qingdao Technological University Qingdao 266033) Abstract:Regeneration powder is fine powder particles genetated in the process of waste courete partick shaping which pose a threat to the environment and human health.In this paper the basic properties and as a mineral admixture in concrete preparation the impact on the work of different content and the pressive strength of concrete is studieded.The study showed that:Increasing powder content of regeneration makes concrete water demand increases so it has adverse impact on the work of the concrete;for the mechanical properties of concrete in the regeneration of fine powder content is less than 10% the pressive strength of concrete to reduce the amplitude is small when the content is large concrete the pressive strength greatly reduc...
关键词:粉煤灰混凝土;养护条件;抗压强度;抗折强度;渗透性 中图分类号:TU375文献标识码:A文章编号:1005-8249(2018)04-0054-04 Qiu Changhuai (Shanxi Construction First Construction Group Co.,Lad,Xi'an710000,China) Abstract:Different typesfconretehave different senstivitiestotheconservation nvronenTo study theinuencefdifferen uring condiinliffhssthstaddnetratsaknd ahtrlatbyhihhlsn pabilinil results havebeenobtained:1)Whencment isreplaced withy ashtheearly strengthffyashconcreteisrelatively lowbut as the curing timenesthtonftfyhthet illgllpnthltstthflyhillglly catchupwithrdinaryet)Uehgeraturecuingndisrlytngthfyahnetnresfastes strengthatlatstaisrelativlwelwtmatuurngondiionthstnthfflycreismhthnthtf curingcondiioninthae perioddthestrengthfflyashcnretishigestnethwateonseaticndion3Inthlatae the tensil strnthandexural stnthfflyacnretearhighestnde watcuincondiosaarewestundltmeratue cng conditions whichreaching only 58%and 6% of the standard curing conditions. Keywordlyahreturngonditonpresvestrengthexuralstrengthpeability 随着人类社会科学以及工业技术的不断进步,也成为了当务之急(2。