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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第二期

    高強再生骨料混凝土的耐久性能及影響因素研究
    高強再生骨料混凝土的耐久性能及影響因素研究
    • 許 穎,劉 杰,唐天佑
    2017年第2期
    摘要
    引用本文
    摘 要: 目前,國內外所制備的再生骨料混凝土的強度值都較低,只能用于非承重構件,另外對再生骨料混凝土耐久性方面的研究仍不多。本文利用廢棄混凝土,按照所提出的一種新生產工藝制備再生骨料,然后按照要求配制成高強度再生骨料混凝土。研究發現:采用取代率為50%的再生粗骨料和取代率為30%的再生細骨料所配制的再生骨料混凝土強度能夠達到高強混凝土強度要求。此外,本文研究了高強再生骨料混凝土的耐久性能,探討了粉煤灰、二次攪拌、再生粗骨料最大粒徑和初始含水狀態對高強再生骨料混凝土的收縮性能、抗碳化性能、抗氯離子滲透性能和抗硫酸鹽侵蝕性能的影響。 Abstract: At present, the strength of recycled aggregate concrete is normally low in China and abroad and it can only be used for non-bearing components. Moreover, there are few studies on the durability of recycled aggregate concrete. In this paper, waste concrete is used to prepare recycled aggregate according to the new proposed preparation process, and high strength recycled aggregate concrete is then prepared. It is found that the strength of recycled aggregate concrete with 50% replacement rate of recycled coarse aggregate and 30% replacement rate of recycled fine aggregate could meet the requirement of high strength concrete. In addition, this study evaluates durability of high strength recycled aggregate concrete prepared by the new process. The influences of fly ash, mixing method, maximum size of recycled coarse aggregate and initial water content of recycled coarse aggregate on shrinkage, carbonation resistance, resistance to chloride ion penetration and sulfate attack are also investigated.
    許穎,劉杰,唐天佑.高強再生骨料混凝土的耐久性能及影響因素研究[J].混凝土與水泥制品,2017(2):1-8. XU Y,LIU J, TANG T Y.Research on Durability and Influence Factors of High Strength Recycled Aggregates Concrete[J].China Concrete and Cement Products,2017(2):1-8.
    靜水壓下混凝土初期滲水深度的力學分析
    靜水壓下混凝土初期滲水深度的力學分析
    • 馬 莉1,李 盛2,3,王起才2,3,郭玉柱2,3,于本田2,3,寧貴霞2,3
    2017年第2期
    摘要
    引用本文
    摘?要:基于流體滲流原理,利用彈性力學理論,對以水壓力為主要驅動力的孔隙初期滲水進行了力學計算分析,把孔隙形狀假定為圓柱形孔隙,考慮滲水對孔隙內部空氣壓縮的影響,推導出了滲水深度計算公式。依據此理論計算方法,對影響滲透深度的孔隙半徑、長度、滲水時間、溫度、外界壓力等參數進行了敏感性分析。結果表明,滲水深度隨水壓力的增大逐漸趨于穩定,當水壓超過混凝土抗滲規范規定的1.2MPa后,滲水深度變化不明顯,基本可以忽略;水的溫度對滲水深度影響不明顯,這與規范基本吻合??紫栋霃經Q定滲水速率,孔隙長度決定總的滲水深度;隨著滲水時間的推移,滲水深度逐漸增大,并最終趨于穩定,且孔徑越小,達到穩定所需要的時間越長。Abstract:Basedonthefluidpercolationprincipleandtheelasticmechanicstheory,themechanicalcalculationofporeinitialseepageunderthewaterpressureasthemainpoweriscarriedout.Theporeconfigurationassumesascylindrical,consideringtheinfluenceofseepagefortheaircompressedinthepore,thecalculationformulaofseepagedepthisderived.Accordingtothetheoreticcalculationmethod,thesensitivityanalysisisperformedtostudytheparameterssuchasporeradius,length,time,temperatureandambientpressurewhichaffecttheseepagedepth.Theresultsshowthattheseepagedepthisgraduallystabilizedwiththeincreaseofwaterpressure.Whenthewaterpressuremorethan1.2MPawhichistheresistancepermeabilityspecificationprovided,theseepagedepthchangeisnotobviousandcanbeignored.Theeffectofwatertemperatureisnotobviousforseepagedepth,itbasicallyagreeswellwiththestandard.Theseepagerateisdeterminedbytheporeradius,thetotalseepagedepthdeterminestheporelength.Withthepassageoftheseepagetime,seepagedepthincreasesgraduallyandfinallytendstobestable,thesmallertheporediameter,thelongerthetimerequiredtoachievingstability.
    馬莉,李盛,王起才,等.靜水壓下混凝土初期滲水深度的力學分析[J].混凝土與水泥制品,2017(2):9-12. MA L,LI S,WANG Q C,et al.Mechanical Analysis on Initial Seepage Depth of Concrete under Hydrostatic Pressure[J].China Concrete and Cement Products,2017(2):9-12.
    礦物摻合料對自密實輕骨料混凝土工作性能及力學性能影響的試驗研究
    礦物摻合料對自密實輕骨料混凝土工作性能及力學性能影響的試驗研究
    • 董健苗,杜亞聰,王亞東,燕元晶,聶 浩
    2017年第2期
    摘要
    引用本文
    摘 要:采用絕對體積法配制自密實輕骨料混凝土(SCLC),研究不同礦物摻合料對自密實輕骨料混凝土工作性能及力學性能的影響。通過10組配合比設計表明,在單摻情況下,粉煤灰能有效提高拌合物的流動性,但會降低SCLC的早期和后期抗壓強度;硅灰能夠明顯提高SCLC的早期和后期抗壓強度,但會降低拌合物的流動性。綜合流動性和抗壓強度的改善效果,復摻粉煤灰和硅灰對配制自密實輕骨料混凝土效果最佳。 Abstract: Using the absolute volume method, the influences of different mineral admixtures on the working performance and the mechanical properties of self-compacting lightweight aggregate concrete(SCLC) are studied. Through 10 groups of different mix design, the results show that with only one kind of mineral admixtures, the fly ash can improve the liquidity of SCLC, but it will reduce the early and late compressive strength of SCLC. The silica fume can improve the early and late compressive strength of SCLC, but the liquidity of SCLC will be loss. In order to improve the fluidity and strength, the effect of mixing fly ash and silica fume on preparation of self-compacting lightweight aggregate concrete is the best.
    董健苗,杜亞聰,王亞東,等.礦物摻合料對自密實輕骨料混凝土工作性能及力學性能影響的試驗研究[J].混凝土與水泥制品,2017(2):13-16. DONG J M,DU Y C,WANG Y D,et al.Experimental Study of Mineral Admixtures on Workability and Mechanical Properties of Self-compacting Lightweight Aggregate Concrete[J].China Concrete and Cement Products,2017(2):13-16.
    生態型透水混凝土物理力學性能研究進展
    生態型透水混凝土物理力學性能研究進展
    • 張衛東1,王成武1,陸 路2,顧文虎1,彭寧波1
    2017年第2期
    摘要
    引用本文
    摘 要:為了緩解城市環境問題,促進人類生存環境的良性發展,透水混凝土逐漸被關注并被用作低交通量道路的路面材料。本文簡要總結了近年來透水混凝土在基本力學性能、透水及抗堵塞性能、抗凍融耐久性、耐磨性及凈水性能等方面的主要研究進展,綜合分析了目前透水混凝土研究中的不足之處,并對該領域的發展趨勢提出了一定的建議和意見。 Abstract: In order to alleviate the problem of urban environment, to promote the benign development of human living environment, pervious concrete is gradually being concerned and used as pavement material for low-volumn roads.The main research progress of basic mechanical properties, water permeability and anti clogging performance, freezing and thawing durability, abrasion performance and water purification performance of pervious concrete in recent years are summaried briefly, the deficiency of the current research on pervious concrete is analyzed comprehensively, and the development trend of the field is proposed.
    張衛東,王成武,陸路,等.生態型透水混凝土物理力學性能研究進展[J].混凝土與水泥制品,2017(2):17-23+28. ZHANG W D,WANG C W,LU L,et al.Research Development of Physical-mechanical Performance of Ecological Pervious Concrete[J].China Concrete and Cement Products,2017(2):17-23+28.
    駱馬湖砂對預拌混凝土的影響及應對措施
    駱馬湖砂對預拌混凝土的影響及應對措施
    • 王高明,姜海東,王 毅,鄭春揚,郭兆來,王子明
    2017年第2期
    摘要
    引用本文
    摘 要:對于工程中駱馬湖砂導致預拌混凝土坍落度損失過快的問題,對駱馬湖砂的含泥量、泥塊含量、細度模數、飽和面干吸水率進行了測試,分析了泥對凈漿和砂漿的影響,試驗了分別摻加聚丙烯酸鈉、季銨鹽類低聚物和腐殖酸鈉三種功能助劑對駱馬湖砂中泥的屏蔽效果,在減水劑摻量為膠材用量的1.4%、聚丙烯酸鈉摻量為0.3%或季銨鹽類低聚物的摻量為0.4%時,混凝土坍落度具有較好的保持能力,1h無損失,且均能滿足混凝土強度設計要求。 Abstract: Aiming at the project of Luoma Lake sand in ready-mixed concrete slump loss too quick, the Luoma Lake sand clay content, clay content, fineness modulus and saturated surface dry water absorption were tested, and the influence of mud on the pure paste and mortar was analyzed. The shielding effect of adding sodium polyacrylate, quaternary ammonium salt oligomer and sodium humic acid on the Luoma Lake sand mud was tested. When the content of water reducing agent for cement amount was 1.4%, sodium polyacrylate admixture dosage was 0.3% or quaternary ammonium salt oligomer was 0.4%, the slump of concrete has good ability, 1 hour without loss, and the concrete can meet the design requirements of strength.
    王高明,姜海東,王毅,等.駱馬湖砂對預拌混凝土的影響及應對措施[J].混凝土與水泥制品,2017(2):24-28. WANG G M,JIANG H D,WANG Y,et al.Influence and Measures of Luoma Lake Sand on Ready-mixed Concrete[J].China Concrete and Cement Products,2017(2):24-28.
    砂級配對混凝土氣泡參數的影響研究
    砂級配對混凝土氣泡參數的影響研究
    • 李 煒1,2,陸加越1,2,趙少鵬1,2,趙 爽1,2
    2017年第2期
    摘要
    引用本文
    摘??要:通過人工搭配多種級配參數的砂,分別采用混凝土含氣量儀與氣泡參數分析系統,研究了砂級配對混凝土氣泡參數的影響規律。結果表明,砂的級配參數與混凝土含氣量、氣泡穩定性、氣泡孔徑分布及氣泡間距系數等氣泡參數存在確定的影響規律,依據此規律可通過砂級配調整有效地改善混凝土氣泡參數。Abstract:Theinfluenceofsandgradingontheconcretebubbleparameterswasstudiedbyusingthegasmeterandthebubbleparameteranalysissystem,bymixingavarietyofgradedsand.Theresultsshowthatitexistsdeterminatedlawofinfluencebetweenthesandgradingparametersandtheconcretebubbleparameterssuchasaircontent,bubblestability,poresizedistributionofbubblesandbubblespacingcoefficient.Accordingtothislaw,theconcretebubbleparameterscanbeeffectivelyoptimizedthroughthesandgradingadjustment.
    李煒,陸加越,趙少鵬,等.砂級配對混凝土氣泡參數的影響研究[J].混凝土與水泥制品,2017(2):29-32. LI W,LU J Y,ZHAO S P,et al.Effecting Study of Sand Grading on Concrete Bubble Parameters[J].China Concrete and Cement Products,2017(2):29-32.
    傳統管樁生產車間技術改造的探索與實踐
    傳統管樁生產車間技術改造的探索與實踐
    • 陳玉文
    2017年第2期
    摘要
    引用本文
    摘 要:針對傳統管樁生產線存在的5個主要問題,提出了相應的技改措施。對生產工藝進行了重新布局,將喂料方式改為模具移動式,并結合自動夾具的使用、蒸養池的改造以及上模架的使用,提高了生產效率、生產安全性及產品質量,減少了工作人員,有效改善了生產環境。 Abstract: In view of the five major problems of the traditional pile production line, the corresponding technical transformation measures are put forward, such as the arrangement of production process layout is relocated, the way of feeding is changed to mould moving, the automatic fixture is used, the steam chamber is reconstructed and up-mould stand is used. Based on these measures, production efficiency, production safety, product quality and the production environment are improved and the production costs is reduced.
    陳玉文.傳統管樁生產車間技術改造的探索與實踐[J].混凝土與水泥制品,2017(2):33-36. CHEN Y W.Discussion and Practice of Technical Transformation for Traditional Pipe Producton Workshop[J].China Concrete and Cement Products,2017(2):33-36.
    PCCP管道承插口灌縫砂漿研制與性能研究
    PCCP管道承插口灌縫砂漿研制與性能研究
    • 王子龍1,石妍然1,寧逢偉1,2,張 豐1
    2017年第2期
    摘要
    引用本文
    摘?要:研制了一種具有大流動性、黏聚性好、微膨脹、高抗裂性能和耐久性能的灌縫砂漿。試驗結果表明,與普通水泥砂漿相比,所研制的灌縫砂漿初始砂漿擴展度增大了24%,泌水率為0,初終凝時間延緩了10~11h,12d干縮變形率降低了66%,圓環開裂試驗90d未發現開裂現象。研制的灌縫砂漿的工作性能、力學性能、抗裂性能和耐久性能均有明顯優勢。Abstract:Anewkindofgroutingmortarisdeveloped,whichhasexcellentfunctioninhighfluidity,goodglutinosity,slightexpansion,highcrack-resistanceanddurability.Theexperimentalresultsshowthatcomparedwithordinarycementmortar,theinitialslumpflowofthegroutingmortarincreasesby24%,thebleedingrateis0,theinitialandfinalsettingtimeisdelayedby10~11h,the12ddryshrinkagedeformationratedecreasesby66%,thecrackingphenomenonneverhappensin90dusingtheringcrackingtest.Thenewgroutingmortarhasgreatadvantageinaspectofworkability,mechanicalproperties,crack-resistanceanddurability.
    王子龍,石妍然,寧逢偉,等.PCCP管道承插口灌縫砂漿研制與性能研究[J].混凝土與水泥制品,2017(2):37-40. WANG Z L,SHI Y R,NING F W,et al.Development and Properties Research on Grounting Mortar of PCCP Pipe Bell and Spigot[J].China Concrete and Cement Products,2017(2):37-40.
    薄壁方鋼管混凝土柱-空心鋼管梁節點單調加載試驗研究
    薄壁方鋼管混凝土柱-空心鋼管梁節點單調加載試驗研究
    • 張兆強,姚 勇,吳先哲
    2017年第2期
    摘要
    引用本文
    摘??要:以軸壓比為主要考察參數,對6個1∶1足尺模型的薄壁方鋼管混凝土梁柱節點進行了單調加載試驗。試驗觀察了受力過程和破壞形態,得到了梁端荷載-位移曲線,并分析了節點的剛度、承載力和延性等重要指標。結果表明,試件節點均經歷了彈性、梁局部屈服、塑性、破壞等階段,直焊型節點的破壞主要是由梁局部屈曲及柱棱角處拉裂引起,螺栓節點的破壞主要是由于梁與柱貼板間焊縫開裂引起,加腋節點中加腋板顯著增強了節點域剛度,塑性鉸形成于梁上并遠離節點區域,其破壞主要由梁局部屈曲引起,節點域完好,較好地滿足了“強柱弱梁、節點更強”的抗震設計目標;采用螺栓貫穿連接措施對節點初始剛度影響不大,而采用加腋手段對節點初始剛度提高顯著;加腋和螺栓貫穿連接措施均能較大地提高節點的承載力;隨著軸壓比的增大,試件極限承載力有一定小幅降低,而試件延性下降明顯。Abstract:Consideringaxialcompressionratioasthemainparameter,thetestsonsixfull-scalemodelsofjointsbetweenconcrete-filledthin-walledsquaresteeltubularcolumnsandhollowsteeltubularbeamswerecarriedoutundermonotonicloading.Theloadingprocessandthefailuremodeswereobserved,andtheload-displacementcurvesofbeam-endswereobtained.Basedontheexperimentalresults,themechanicalpropertiesofthejointssuchasthestiffness,bearingcapacityandductilitywereanalyzed.Theresultsshowthatallthejointshaveexperiencedstagessuchaselasticity,localyieldofbeam,plasticityanddestruction.Thedamageofdirectlyweldedjointsismainlycausedbythelocalbucklingofbeamandpullcrackofcornerangleofcolumns,andthedamageofboltonesismainlycausedbyweldcrackofcolumnandbeam.Forhaunchedjoints,thestiffnessissignificantlystrengthenedbythehaunchedplate,thefailureofjointsiscausedbythelocalbucklingofbeam,theplastichingeappearsatthebeamwhereisawayfromtheconnection,andthecoreofjointisundamaged.Thiskindofjointsbettermeetstheseismicdesignprinciples,including"strongcolumnandweakbeam,strongernodes".Themethodofboltconnectionhaslittleinfluenceontheinitialstiffnessofthejoints,whilethemethodofhaunchinghassignificantlyimprovedtheinitialstiffnessofthejoints.Bothofthemethodscansignificantlyimprovethebearingcapacityofthejoints.Withtheincreaseoftheaxialcompressionratio,theultimatebearingcapacityofthespecimensisreducedslightly,whiletheductilityisdecreasedobviously.
    張兆強,姚勇,吳先哲.薄壁方鋼管混凝土柱-空心鋼管梁節點單調加載試驗研究[J].混凝土與水泥制品,2017(2):41-44. ZHANG Z Q,YAO Y, WU X Z.Experimental Study on Monotonic Loading of Concrete-filled Thin-walled Square Steel Column-hollow Steel Tube Beams Joints[J].China Concrete and Cement Products,2017(2):41-44.
    貴州地區橋梁用機制砂混凝土原材料優選研究
    貴州地區橋梁用機制砂混凝土原材料優選研究
    • 靳麗蓮1,張國榮2,3,路 璐2,3,孫 震2,3
    2017年第2期
    摘要
    引用本文
    摘 要:針對貴州地區公路工程橋梁用高性能混凝土機制砂石粉含量高、粉煤灰質量差等問題,對不同石粉含量、不同礦物摻合料的機制砂混凝土性能進行了試驗研究。研究結果表明,石粉雖作為惰性材料,但在一定摻量范圍內,對混凝土性能具有一定程度的改善。在實際工程中,建議石粉含量控制在10%左右;Ⅱ級粉煤灰因其燒失量大、活性小對混凝土性能有著不利的影響;磨細復合摻合料可顯著提升機制砂混凝土工作性能、力學性能以及耐久性能。因此,針對貴州地區優質粉煤灰匱乏的現狀,建議將低等級粉煤灰與磨細礦渣進行二次加工磨細后再摻入混凝土使用。此外,根據研究成果在工程中的應用情況,提出了貴州地區橋梁用機制砂混凝土原材料的選型標準。 Abstract: According to the problems of manufactured sand high performance concrete in highway bridge project in Guizhou area, such as high content of sand powder and poor quality of fly ash, the study of manufactured sand concrete with different mineral admixtures and sand powder is carried out. The results show that although the powder is the inert material, but concrete properties can be improved in a certain dosage range. Recommended powder content is controlled at about 10%. Because of large burning loss and low activity, Ⅱ grade fly ash has a negative effect on the performance of concrete. Ground composite admixture can significantly improve the performance of manufactured sand concrete. Therefore, in view of the present situation of lack of high quality fly ash in Guizhou area, it is suggested that using low grade fly ash and slag to fine grind again. Based on the application of research results in engineering, selection criteria of raw materials for the construction of bridges in Guizhou area is put forward.
    靳麗蓮,張國榮,路璐,等.貴州地區橋梁用機制砂混凝土原材料優選研究[J].混凝土與水泥制品,2017(2):45-49. JIN L L, ZHANG G R, LU L,et al.Selection Research of Raw Materials for Artificial Sand Concrete of Bridges in Guizhou Area[J].China Concrete and Cement Products,2017(2):45-49.
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