第十期_2014_《混凝土與水泥制品》雜志社

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第十期

適合快速通車的環保型水泥基灌漿材料性能分析

李勝利，徐婷婷，張征，孫攀旭

２０14年第10期

摘要

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摘要：為了滿足道路半剛性基層隱含裂縫的灌漿要求，研究了一種快硬硫鋁酸鹽水泥與普通硅酸鹽水泥復配的水泥基灌漿材料；同時輔以減水劑對不同配合比灌漿材料的灌漿特性進行了研究。結果表明，得到15min內流動性好、30min達到初凝、2h內強度增長快的水泥基灌漿材料的最佳配合比為水泥∶水∶減水劑=1∶0.35∶0.015，其中快硬硫鋁酸鹽水泥與普通硅酸鹽水泥的比值為0.5625，AS氨基磺酸系減水劑與FDN萘系減水劑1:1復合使用。 Abstract: In order to meet the grouting requirement of the concealed crack in road base, characteristics of grouting for the grouting materials including water reducer of different proportion of mixture are researched. The results show that the optimum mixture ratio of the cement based grouting material is cement, water, water reducer =1∶0.35∶0.35. The cement based grouting material has good liquidity within 15 minutes, achieves initial setting in 30 minutes and has quickly increasing strength within 2 hours. The ratio of the sulphoaluminate cement and Portland cement of the grouting materials is 0.5625∶1. The water reducer ratio of the AS amino sulfonic acid-based and FDN naphthalene formaldehyde is 1:1.

再生透水混凝土中再生骨料摻量問題的研究

朱金春1，楊鼎宜1，張曉歡1，史振宇1，張佩玲1，朱廣軍2，仇圣彪2，劉大慶2

２０14年第10期

摘要

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摘要：選用5種再生骨料摻量方案（0、25%、50%、75%、100%）研究再生透水混凝土中的再生骨料合理摻量，每一種摻量方案都按照三因素三水平正交試驗進行?？刂扑槭壟?、設計孔隙率和水灰比這三個因素，考察抗壓強度、有效孔隙率和透水系數這三個評價指標，比較不同再生骨料摻量下各評價指標的變化規律。結果表明，再生透水混凝土中再生骨料的合理摻量為30%。 Abstract: Five kinds of recycled aggregate quantity scheme (0, 25%, 50%, 75%, 100%) is selected to research the recycled aggregate reasonable content of recycled pervious concrete problems, and each quantity scheme is carried out in accordance with the 3 factors and 3 levels of orthogonal test. Controlling the aggregate size, the design of porosity and water-cement ratio of these 3 factors, the compressive strength, effective porosity and permeability coefficient of the 3 indexes are investigated. Different change rules of recycled aggregate quantity to each evaluation index are compared, and the results show that the reasonable mixing recycled aggregate of pervious concrete in weight is 30%.

礦渣-稻殼灰基堿激發膠凝材料的制備

詹蘭1，郭麗萍2,3,4

２０14年第10期

摘要

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摘要：以工農業廢料礦渣、稻殼灰為主要原料，制成一種新型膠凝材料，并對此膠凝材料的強度進行探討，就不同種類的堿激發劑等因素進行探究。同時，用X射線衍射分析不同齡期此體系堿激發膠凝材料的礦物組成，并用掃描電鏡觀察不同齡期材料的微觀形貌。結果表明，稻殼灰的活化可采用“兩段煅燒法”，堿組分含量為10%、激發劑為水玻璃時激發效果最好，膠凝材料水化產物為低鈣硅比的 C-S-H 凝膠。 Abstract: A slag-rice husk ash cementing material is prepared by using slag and rice husk ash as raw materials and alkali as activator. The strength of the material, the different effects of different kinds of alkali activators, and the hydration products of the cementing material are studied. The mineral composition of the material at different ages is analyzed by X-ray diffraction. The microstructure of hydration products of this material at different ages are characterized by scanning electron microscope with X-ray energy dispersive technique. The results show that the activation of rice husk ash could be made from “calcination by steps”. The highest strength is made from the specimen which is used 10% (the Na2O mass ratio) sodium silicate. The hydration product is low calcium-silicate ratio C-S-H gel.

機制砂對新拌混凝土工作性影響及減水劑對其適應性研究

閔婕，韓靜云，宋旭艷

２０14年第10期

摘要

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摘要：研究了機制砂對新拌混凝土坍落度、擴展度、含氣量以及抗壓強度的影響，并探討了聚羧酸高效減水劑和萘系減水劑在機制砂混凝土中的適用性。結果表明，機制砂的摻入會對混凝土的和易性產生一定影響，新拌混凝土的流動性變差，最多下降了25%。機制砂能夠顯著改善低強度混凝土的抗壓強度。對于機制砂混凝土，萘系減水劑具有更好的適用性，相同配比下能夠獲得更好的和易性以及更高的抗壓強度。 Abstract: The effect of manufactured sand on the performance of fresh concrete is studied, which contains slump, slump flow, gas content and compressive strength. The study on applicability of polycarboxylate and naphthalene superplasticizer in the concrete which mixed with manufactured sand is also carried out. The result show that the workability of the concrete would be affected when mixed with manufactured sand, the mobility of the fresh concrete would decrease with the maximum rate of 25%; the compressive strength of low-strength concrete would improve significantly with the mixture of manufactured sand. Finally, with the same proportion, when mixed with naphthalene superplasticizer, the concrete mixed with manufactured sand would get a better workability and higher compressive strength, which indicates a better applicability of naphthalene superplasticizer .

膨脹珍珠巖粒徑對水泥砂漿性能的影響

聶光臨，孫詩兵，姚曉丹，田英良

２０14年第10期

摘要

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摘??要：選用膨脹珍珠巖作為水泥砂漿的內養護材料，研究了膨脹珍珠巖粒徑對水泥砂漿收縮率及力學性能的影響。結果表明，膨脹珍珠巖粒徑的減小會降低其早期吸水能力，提高其后期釋水速度，因而膨脹珍珠巖粒徑對砂漿收縮率的影響與時間有關；前45d，0.425～0.250mm珍珠巖砂漿的收縮率最??；45～60d，砂漿收縮率隨珍珠巖粒徑的減小而增大；砂漿的抗壓強度、抗折強度、拉伸粘結強度基本隨著膨脹珍珠巖粒徑的減小而逐漸增大，且珍珠巖粒徑的減小對提高砂漿的柔韌性有利。Abstract:Theexpandedperliteastheinternalcuringmaterialofthecementmortarisselected,andtheinfluencesofthesizeofexpandedperliteparticlesontheshrinkageandmechanicalpropertiesofthemortararestudied.Theresultsshowthattheearlywaterabsorbingcapacityoftheexpandedperlitewouldreduceandthelatewaterreleasingspeedwouldimprovewiththedecreaseofthesizeofperliteparticles,sotheeffectofthesizeoftheperliteparticlesontheshrinkageofcementmortarisrelatedtothetime.Themortarwiththeperliteparticlessizesbetween0.425to0.250mmhastheminimumshrinkageintheinitial45days.Theshrinkageofmortarincreaseswiththereductionofthesizeofperliteparticlesin45to60days.Thecompressivestrength,flexuralstrengthandtensilebondingstrengthofthemortarincreasewiththereductionofthesizeofperliteparticles,andthereductionofthesizeofperliteparticlesisbeneficialtoimprovingtheflexibilityofthemortar.

超硫酸鹽水泥制備C60~C80高強混凝土的試驗研究

向佳瑜，余保英，李紅傲

２０14年第10期

摘要

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摘??要：采用超硫酸鹽水泥（簡稱SSC）、微珠和硅灰制備C60～C80混凝土。通過改變微珠和硅灰的摻量，考察其對SSC混凝土相關性能的影響，進行了SSC混凝土力學性能、非接觸收縮和微觀機理方面的研究，借助掃描電子顯微鏡和X射線衍射分析儀研究了SSC試件礦物組成。研究表明，C60～C80SSC混凝土膠凝材料體系中，微珠的適宜摻量為10%～20%，硅灰的適宜摻量為5%～10%。適宜摻量下的微珠和硅灰對SSC混凝土工作性能和力學性能有很好的改善作用，微珠和硅灰使得體系級配更好，可提高SSC混凝土強度達10%以上。硅灰和微珠增加了試件的收縮程度，且粒徑越小，收縮率越大。SSC水化產物主要由鈣礬石、二水石膏、SiO2、C-S-H凝膠和少量Ca(OH)2（5%以內）組成。Abstract:Thesupersulfatecement(SSC),micro-beadandsilicafumeareemployedtoprepareC60～C80concrete.Bychangingthecontentofmicro-beadandsilicafumetoinvestigatetheeffectofSSCconcreterelatedproperties,andthenthemechanicalstrength,non-contactshrinkageandmicroscopicmechanismarecarriedout.ThemineralcompositionofSSCsamplesareanalyzedbyscanningelectronmicroscopeandX-raydiffractometer.Experimentalresultsshowthattheappropriatecontentofmicro-beadandsilicafumearerespective10%～20%and5%~10%incementitiousmaterialsofC60～C80SSCconcrete.Themicro-bead,silicafumehaveprominentinterstitialeffectandsystemwithexcellentgradationtoimprovetheworkingandmechanicalperformancesofSSCconcrete,andcanincreasetheSSCconcretestrengthmorethan10%.Themicro-beadandsilicafumehaveincreasedthecontractiondegreeofsamples,thesmallerparticlesize,thegreatershrinkagerate.Sampleshydrationproductsaremainlycomposedofettringite,dihydrategypsum,SiO2,C-S-HgelandasmallamountofCa(OH)2(5%).

$頁巖陶?；炷凉ぷ餍约皬姸仍囼灧治? /> </div>  <div class="content">  <a href="/product/1587.html" target="_parent" class="title"><i class="iconfont12"></i>頁巖陶?；炷凉ぷ餍约皬姸仍囼灧治?/a> <ul class="attrBox"> <li class="attrList">    <span class="attrValue"><i class="iconfont2"></i> 范瑛宏1,2，彭鵬1，侯子義2 </span> </li> </ul> <div class="toggle relative"> <div class="attrBox1"> <div class="attrList1">    <span class="attrValue"> ２０14年第10期 </span> </div> </div>  <div class="zhai"><i class="iconfont11"></i>摘要</div> <div class="zhai1"><i class="iconfont11"></i>引用本文</div> <span class="newMs">摘??要：頁巖陶粒吸水返水作用對混凝土養護具有重要影響。通過對坍落度和抗壓、抗折強度進行對比分析，確定不同砂率和水灰比對頁巖陶?；炷凉ぷ餍院蛷姸鹊挠绊懸幝杉绊搸r陶?；炷恋钠茐囊幝?。結果表明，頁巖陶?；炷恋奶涠入S砂率的增大而減小，確定滿足路用要求的最佳砂率范圍（未加減水劑）為35%～39%；頁巖陶?；炷翉姸入S齡期的變化符合一般規律，與普通混凝土不同的是，強度隨水灰比的增大呈現出先增大后降低的變化規律，確定滿足路用要求的最適宜水灰比范圍為0.37～0.39；頁巖陶?；炷疗茐耐ǔ樘樟嗔押退嗌皾{碎裂，兩者協調下，才能充分發揮材料強度。Abstract:Concretecuringisinfluencedbywaterabsorptionanddesorptionofshaleceramsite.Inordertodeterminetheinfluencelawofshaleceramsiteconcreteworkabilityandstrength,andfailurelawaffectedbydifferentsandrateandwater-cementratio,theslump,compressivestrengthandflexuralstrengthofshaleceramsiteconcretearecomparedandanalyzed.Theresultsshowthattheslumpofshaleceramsiteconcretedecreaseswiththeincreaseofsandrate.Determinedtomeetthebestroadperformanceofthesandraterange(notaddedwaterreducingagent)is35%～39%.Shaleceramsiteconcretestrengthincreaseswiththeincreaseofagegrowth,thesamechangeruleasthenormalconcrete.However,atthebeginning,withtheincreaseofwatercementratio,concretestrengthpresentsincreasedandthendecreased.Determinedtomeetthebestroadperformanceofthewater-cementratiorangeis0.37～0.39.Thefractureofshaleceramsiteconcreteisusuallyceramsitedamageandcementmortarfracture,therefore,thestrengthofconcreteisdevelopedcompletelythroughthecoordinationofthosetwofactors.</span> <div class="attrBox3"> </div> </div> </div> </div> </div> <div class="col-md-4 col-sm-6 colList"> <div class="thumbnail">  <div class="topBox relative1"> <img src="" title=$

熟石膏粉等多種摻合料在免壓蒸PHC管樁中的應用研究

許遠榮1，向安樂1，鄭國治1，伍飛才2，孫寶剛2

２０14年第10期

摘要

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摘要：通過比較不同減水劑類型、不同石膏類型及摻量、不同摻合料種類及摻量對混凝土拌合物及硬化混凝土的影響，研究了熟石膏粉（β-硫酸鈣）等多種摻合料在免壓蒸PHC管樁中的應用。結果表明，以適宜比例摻入熟石膏粉、A類摻合料和B類摻合料可以明顯改善混凝土拌合物性能和硬化混凝土的孔隙結構，加快混凝土水化硬化進程，進而提高PHC管樁的混凝土早期抗壓強度和后期的耐久性能。 Abstract: By comparing influences of different kinds of water reducing agent, different gypsum type and mixing content, types and contents of admixtures on concrete mixture and hardened concrete, the application of the gypsum powders (β-calcium sulfate) and other admixtures in the non-steam autoclaved PHC piles are studied. The test results show that with appropriate proportion of gypsum powder, A and B type admixtures can obviously improve concrete properties and pore structures of hardened concrete, accelerate the process of concrete hydration hardening, thus improve early compressive strength and later durability of the concrete of PHC piles.

PHC管樁堆放層數的計算方法探討

何友林

２０14年第10期

摘要

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摘要: 通過對堆放管樁產品進行受力分析，利用材料力學理論，推導出了管樁產品堆放時的最大彎矩和應力關系式。并以管樁混凝土由彎矩引起的應力應小于等于混凝土軸心抗拉強度標準值作為判據，確定出管樁產品堆放的最大層數，為管樁安全堆放保證管樁產品質量提供了理論依據。 Abstract：By force analysis for stacking PHC pile and application of the materials mechanics theory, the relational expression of the maximum bending moment and stress is put forward. The maximum layers of piles stacking are determined according that the stress of piles concrete caused by bending moment should be less or equal to the standard value of concrete axial tension strength.The theoretical basis is provided for stacking piles safely and guaranteeing quality of piles.

預應力管樁樁-土動力p-y曲線研究

李光明1,2，劉春原3，李明生2

２０14年第10期

摘要

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摘要：通過有限元軟件ABAQUS建立以振動臺試驗為基礎的數值模型來研究樁-土水平位移的變化規律。并使用P-Y曲線法分別對預應力管樁在不同加速度峰值、不同樁型以及不同土體類別的條件下樁與土的變形進行了研究。研究表明，隨著地震加速度峰值的增大，淤泥質粘土地區的樁側土體以及樁身都會提前出現破壞。兩樁、三樁、四樁樁身水平位移隨著水平荷載的增大變化較單樁變化大，在相同水平地震荷載作用下，樁數越多，水平位移變化越大，其中三樁和四樁位移變化規律接近，四樁具有承受較強地震荷載的受力性能，體現了群樁受力的優勢。 Abstract: The displacement variation of pile-soil horizontal is studied by using the finite element software ABAQUS to set the shaking table test of the numerical model. The deformations between the prestressed piles and soil under the conditions of different peak acceleration, different types of piles and different soil categories are researched by the P-Y curves. The study results show that with the increasing of the peak of earthquake acceleration, pile side soil and the pile body in silty clay area will appear destruction ahead. With the increasing of the horizontal loads, the horizontal displacement changes of the piles such as two-pile, three-piles and four-pile are bigger than that of the single pile. Under the same horizontal seismic loads, the more piles there are, the greater horizontal displacement of the piles changes. Among them, the displacement variation of two-pile is close to that of three-pile. Four-pile could withstand the strongest seismic loading force in the four kinds of piles, and its performance reflects the advantages of pile group.

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