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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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    第五期

    依托京津冀協同發展戰略,通過資源化利用緩解北京砂石供需矛盾
    依托京津冀協同發展戰略,通過資源化利用緩解北京砂石供需矛盾
    • 薛 軍1,陳旭峰2,鄭永超2,李 飛3,閆乃斌1
    2017年第5期
    摘要
    引用本文
    摘 要:建筑砂石是消耗自然資源最多的建材產品。隨著京津冀一體化和疏解北京市非首都功能進程的推進,北京地區建筑砂石需求與供給之間的矛盾異常突出。從北京市建筑砂石市場所面臨的現狀出發,北京市住建委聯合北京建筑材料科學研究總院對北京及周邊河北省各區縣建筑砂石資源及供給情況進行了調研分析。調研結果發現,建立京津冀建筑砂石供應調控聯動機制和建設建筑砂石綠色骨料產業基地的必要性。同時,在此次調研的基礎上,提出了對北京地區砂石行業供給側和需求側改革的對策和建議。 Abstract: Aggregates are the major building materials consuming massive natural resources in construction industry. As the strategic plan of integrating Jing-Jin-Ji regional development and redefining Beijing capital city functions has been carrying on, the contradiction between demand and supply of aggregates in construction industry has appeared prominently in Beijing region. With the current situation facing construction market in Beijing region, along with Beijing Building Materials Academy, Beijing Municipal Commission of Housing and Urban-rural Development carried out the state-of-art investigation on the aggregate resources and industrial operation status in Beijing region as well as the region closely surrounding Beijing area. The investigation results indicate the necessity of establishing a united Jing-Jin-Ji regional mechanism for aggregate products supply adjustment and developing green aggregate industry bases. In addition, based on the investigation, the suggestions and comments on supply-side as well as demand-side reform of aggregate industry in Beijing region are presented.
    薛軍,陳旭峰,鄭永超,等.依托京津冀協同發展戰略,通過資源化利用緩解北京砂石供需矛盾[J].混凝土與水泥制品,2017(5):1-4. XUE J, CHEN X F, ZHENG Y C,et al.Relieving Contradiction of Demand and Supply of Aggregates Through Resource Utilization Based on Strategic Plan of Integrating Jing-Jin-Ji Regional Development[J].China Concrete and Cement Products,2017(5):1-4.
    高溫水熱養護砂漿的硫酸鹽早期侵蝕特征研究
    高溫水熱養護砂漿的硫酸鹽早期侵蝕特征研究
    • 陽凱麗1,劉加平1,2,穆 松3
    2017年第5期
    摘要
    引用本文
    摘??要:為了考察硫酸鹽環境中高溫水熱養護砂漿的早期性能劣化特征,采用六種不同C3A含量的水泥制備成砂漿試件(水膠比為0.45),置于60℃的高溫水熱環境中養護3d后浸泡于10000mg/L硫酸鈉溶液中進行了210d浸泡試驗。測試了不同侵蝕齡期試件的變形性能及彈性模量。結果表明,隨著侵蝕齡期的延長,不同C3A含量的高溫水熱養護砂漿試件呈現出先收縮后不斷膨脹的規律,而試件的彈性模量則逐漸增大;砂漿試件的長度變化和侵蝕齡期間滿足一元二次多項式關系。在210d的硫酸鹽侵蝕浸泡條件下,經高溫水熱養護的高抗硫酸鹽水泥砂漿不能有效提高試件的抗硫酸鹽侵蝕性能。Abstract:Inordertostudytheperformancecharacteristicsofwaterheatcuringmortarinsulfatesolution,themortarspecimenswerepreparedwith0.45watertobinderratioandsixdifferentkindsofC3AcontentPortlandcement.Themortarspecimenswerecuredat60℃inwaterfor3dandthelong-timeimmersionsulfateattacktestin10000mg/LNa2SO4solutionwascarriedout.Thecorrespondenceoflengthchangeandyoungmodulusvariationwithsulfateattacktimewasanalyzedrespectively.ThetestresultsshowthatthewaterheatcuringmortarspecimenswithdifferentkindsofC3AcontentPortlandcementexpandgraduallyandtheyoungmodulusofthemortarspecimensareincreasedwiththeincreasingoferosiontime.Therelationshipbetweenlengthchangeanderosiontimehighlymeetthequadraticpolynomialfitting.ThehighsulfateresistantPortlandcementcouldnotimprovethesulfateresistanceofthemortarspecimenssignificantlywhentheyareimmersedinNa2SO4solutionfor210daftercuredat60℃inwater.
    陽凱麗,劉加平,穆松.高溫水熱養護砂漿的硫酸鹽早期侵蝕特征研究[J].混凝土與水泥制品,2017(5):5-10. YANG K L, LIU J P, MU S.Characteristic Research of Sulfate Attack in Early for High Temperature Water Heat-curing Mortar[J].China Concrete and Cement Products,2017(5):5-10.
    超早強外加劑在混凝土中的性能研究
    超早強外加劑在混凝土中的性能研究
    • 楊 勇,張建綱,嚴 涵,毛永琳,舒 鑫,冉千平
    2017年第5期
    摘要
    引用本文
    摘??要:研究了超早強外加劑對不同膠凝材料混凝土新拌性能及不同齡期抗壓強度的影響,考察了不同養護溫度條件下對混凝土抗壓強度的影響,同時研究了超早強外加劑對混凝土耐久性和水泥水化過程的影響。結果表明,超早強外加劑的摻入,對混凝土含氣量和初始坍落度基本無影響,縮短混凝土的初凝和終凝時間60~90min,能有效促進水泥早期水化,縮短水化誘導期,從而大幅提高不同膠凝材料體系、不同溫度下混凝土24h內的抗壓強度,增幅可高達200%,且后期強度穩定增長。?Abstract:Theeffectofsuper-accelerateadmixtureonthefreshmixedconcreteperformanceandcompressivestrengthofdifferentcementitiousmaterialswithdifferentcuringageswasstudied.Theinfluenceofadmixtureonthecompressivestrengthunderdifferentcuringtemperature,andtheconcretedurability,hydrationofcementwasinvestigated.Theresultsshowthatthesuper-accelerateadmixturehasnoinfluenceontheaircontentandinitialslumpofconcrete,shortentheinitialandfinalsettingtimeof60~90min.Itcanacceleratetheearlyhydrationprocessofcementeffectively,andthusimprovethecompressivestrengthofconcreteinthe24hgreatly,anincreaseupto200%,andmakethelatestrengthstablygrowing.
    楊勇,張建綱,嚴涵,等.超早強外加劑在混凝土中的性能研究[J].混凝土與水泥制品,2017(5):11-15. YANG Y, ZHANG J G, YAN H,et al.Performance Study on Super-accelerate Admixture in Concrete[J].China Concrete and Cement Products,2017(5):11-15.
    高形態塑性保持高性能混凝土的制備與應用
    高形態塑性保持高性能混凝土的制備與應用
    • 劉 競,鄭新國,曾 志,李書明,程冠之,董全霄
    2017年第5期
    摘要
    引用本文
    摘 要:構筑物大坡度成型面的坡度保持是混凝土施工質量控制的難點,尤其是在施工時間有限、抹面次數受限的工況下更難控制。針對混凝土所成坡度在硬化前無法有效保持與定型,導致排水或構造坡度不滿足要求的現實難題,通過新拌混凝土形態保持能力、漿體形貌觀察分析等室內試驗以及現場工程試用,研究采用TKC觸變劑來改善新拌混凝土的塑性形態保持能力。結果表明: TKC觸變劑的加入改善了新拌混凝土的坡度保持能力,在泵送壓力無明顯增加、施工難度無明顯增加情況下,其混凝土硬化后坡度保持良好。這主要與TKC觸變劑中纖維狀組分通過纏結、橋接、交織作用形成交聯網絡對漿體及其骨料的束縛、增糙、限位等效應有關。研究成果可為構筑物大坡度混凝土成型面形態保持的技術難題提供一定的借鑒與參考。 Abstract: The shape-holding of structures with large slope forming surface is difficult to control, especially when the construction time is limited and the times of plaster surface is limited. In order to solve the problem that concrete slopes cannot be effectively maintained before hardened, the TKC thixotropic agent is used to improve the shape-holding ability of fresh concrete by indoor and on-site experiments. Results indicate that the addition of TKC thixotropic agent could improve the shape-holding ability of fresh concrete effectively. Moreover, the pumping pressure is not increased obviously. This is mainly due to fibrous gel structures of the TKC thixotropic agent, which will provide valuable and useful references for quality control of concrete structures with large slope forming surface.
    劉競,鄭新國,曾志,等.高形態塑性保持高性能混凝土的制備與應用[J].混凝土與水泥制品,2017(5):16-19. LIU J, ZHENG X G, ZENG Z,et al.Preparation and Application of High Performance Concrete with High Shape-holding Ability[J].China Concrete and Cement Products,2017(5):16-19.
    清水混凝土工程應用中質量通病及應對措施
    清水混凝土工程應用中質量通病及應對措施
    • 王龍志1,夏文杰2,李宗才3,崔 鑫1,4,張海霞1,吳修棟1,薛鳳江1
    2017年第5期
    摘要
    引用本文
    摘 要:清水混凝土以其節約工程成本、提高工程質量、改善企業管理水平等優點,自20世紀90年代后期以來,在技術研究及工程應用方面得到了長足發展。為了更好地促進清水混凝土科學研究與工程應用水平的提高,結合多個清水混凝土工程實踐成果,開展了針對清水混凝土黑斑、裂紋、氣泡、分層、砂線等重要質量通病的研究,對清水混凝土質量通病的成因及應對措施進行了系統分析,形成了有針對性的研究成果。工程實踐表明,依據清水混凝土質量通病及應對措施研究成果可以有效避免多種質量通病的發生、很好地提高清水混凝土施工質量。 Abstract: With its saving project cost, improving the quality of engineering, improving enterprise management level, etc, fair-faced concrete got rapid development in the technology research and engineering application since the late 1990s. In order to better promote the improvement of scientific research and engineering application of fair-faced concrete, combined with a plurality of engineering practice results of fair-faced concrete, the research on important quality faults for fair-faced concrete, spots, cracks, bubbles, layered, sand line was carried out, and the causes and the countermeasures of common quality fault of fair-faced concrete was systemly analyzed, which formed a targeted research results. Engineering practice shows that the research results can effectively avoid the occurrence of a variety of quality problems, and improve the construction quality of fair-faced concrete.
    王龍志,夏文杰,李宗才,等.清水混凝土工程應用中質量通病及應對措施[J].混凝土與水泥制品,2017(5):20-25. WANG L Z, XIA W J, LI Z C,et al.Common Quality Faults and Countermeasures of Fair-faced Concrete in Engineering Application[J].China Concrete and Cement Products,2017(5):20-25.
    關于大體積混凝土中科學利用礦物摻合料問題
    關于大體積混凝土中科學利用礦物摻合料問題
    • 嚴鑫文
    2017年第5期
    摘要
    引用本文
    摘 要:結合大體積混凝土的特點和技術要求,詳細討論了礦物摻合料各種效應的特征,以及對大體積混凝土性能的影響。在此基礎上,提出了礦物摻合料選擇的思路。礦物摻合料的摻量應根據結構的散熱條件和強度要求來確定。根據這些分析,提出了大體積混凝土應采用晚齡期強度評定的觀點。同時,建議大體積混凝土必須加強養護,延長養護時間。 Abstract: The features of the mineral admixtures and their influence on the performance of mass concrete are discussed detailed combined with the characteristic and technical requirements of mass concrete. In the basis, the choosing thought of mineral admixture is put forward. The content of mineral admixture should be determined according to the condition of the dissipation and the requirement on strength of structure. According to the analysis, the viewpoint evaluating mass concrete by the strength at lately age is carried out. Simultaneously, it is considered that the curing of mass concrete must be strengthened and the curing time should be lengthened.
    嚴鑫文.關于大體積混凝土中科學利用礦物摻合料問題[J].混凝土與水泥制品,2017(5):26-29. YAN X W.Problems of Mineral Admixture by Scientific Utilization for Mass Concrete[J].China Concrete and Cement Products,2017(5):26-29.
    凍融環境下預應力混凝土構件疲勞剩余強度分布模型
    凍融環境下預應力混凝土構件疲勞剩余強度分布模型
    • 汪 鑫,張益多,史 康
    2017年第5期
    摘要
    引用本文
    摘 要:基于預應力混凝土受彎構件凍融與疲勞交替試驗,建立考慮凍融影響的混凝土抗壓疲勞剩余強度概率密度模型。通過試驗數據進行參數估計與假設檢驗,驗證得出凍融循環后的混凝土抗壓疲勞剩余強度仍然服從三參數Weibull分布。研究發現,凍融循環加劇了混凝土抗壓疲勞剩余強度的離散性,引入凍融影響因子可表征凍融循環對混凝土抗壓疲勞剩余強度分布參數的影響。 Abstract: The probability density function model of concrete fatigue residual strength which considering frost damage is established based on fatigue and freeze-thaw alternative experiment of PC beams. By hypothesis testing, it is justified that the fatigue residual strength of concrete which subjected to fatigue loading and freeze-thaw cycles(FTCs) is still subjected to 3-parameter Weibull distribution. The study results show that FTCs will aggravate the discreteness of fatigue residual strength. So FTCs factors must be introduced into the parameters to represent the influence of FTCs.
    汪鑫,張益多,史康.凍融環境下預應力混凝土構件疲勞剩余強度分布模型[J].混凝土與水泥制品,2017(5):30-35. WANG X, ZHANG Y D, SHI K.Distribution Model of Fatigue Residual Strength of Prestressed Concrete Member under Freeze-thaw Environment[J].China Concrete and Cement Products,2017(5):30-35.
    大跨徑剛構橋底板崩裂破壞分析
    大跨徑剛構橋底板崩裂破壞分析
    • 張 濤,王有志,尤偉杰,王藝霖,雷海鵬,柳尚斌,劉慶昌,尚 進
    2017年第5期
    摘要
    引用本文
    摘 要:考慮了實際施工中鋼束定位偏差和折線施工引起的徑向力增大,對等效徑向力經典計算公式進行了修正。并在此基礎上,根據混凝土的彈塑性損傷本構關系,對比分析了徑向力增大對底板應力在張拉前后的影響。研究結果表明,施工中引起的徑向力增大會導致底板應力分層,使全界面受壓底板產生局部破壞性拉應力。底板破壞后截面應力重新分布,計算所得應力分布能較好地吻合現場檢測結果。后期加固應考慮應力重分布,同時對箱室底板內側、腹板內側也要進行加固。 Abstract: Considering the radial force augmentation induced by the alter of prestressed cable distribution and polygonal stretch construction, the classical equivalent radial force calculating formula is amended. And thereby based on the amended formula, combined with concrete elastic-plastic damage constitutive relations, the practical construction status is simulated to analysis the stress distribution and the influence of stress augmentation in concrete bottom at period of before and after the prestressed cable stretched respectively. The calculating results indicate because of the stratification of the stress in the concrete bottom, destructive tensile stress emerges at the bottom margin, which is supposed to be compressive stress. The development of crack leads to stress redistribution in concrete bottom area, which can be proved sufficiently by the field measurements. Consequently, the radial force augmentation in the construction shall not be ignored and should be considered seriously in design. Reinforcements on the insides of concrete box web and bottom are necessary.
    張濤,王有志,尤偉杰,等.大跨徑剛構橋底板崩裂破壞分析[J].混凝土與水泥制品,2017(5):36-40. ZHANG T, WANG Y Z, YOU W J,et al.Failure Analysis on Bottom Plate Crack of Long-span Rigid Frame Bridge[J].China Concrete and Cement Products,2017(5):36-40.
    豎張雙折線體外預應力加固RC梁抗裂分析
    豎張雙折線體外預應力加固RC梁抗裂分析
    • 郭 波,李峻峰,顏燕祥,王天穩
    2017年第5期
    摘要
    引用本文
    摘??要:采用體外預應力豎向張拉雙折線布筋加固方法,對2根對比梁和9根不同體外預應力配筋率、不同工況下矩形鋼筋混凝土簡支梁進行了抗彎性能試驗研究。試驗結果表明,采用體外預應力加固RC梁可以顯著提高其極限承載力和抗裂能力。在試驗結果基礎上,運用應力圖形分解法,結合內力及力矩平衡,推導了體外預應力混凝土矩形截面梁開裂彎矩的簡化計算公式,且計算值與試驗值吻合良好。Abstract:Theexternalprestressingverticaltensioningmethodwithdoublebrokenlineisusedtotesttheflexuralbehaviorofelevenreinforcedconcretebeams(twocontrastbeamsandnineexternallyreinforcedbeamswithdifferentprestressedreinforcementratioandreinforcedconditions).TheresultsshowthattheuseofRCbeamsstrengthenedbyexternalprestressingcouldsignificantlyimprovethebearingcapacityandcrackresistanceofbeams.Asimplifiedformulasofcrackresistanceequationofexternallyprestressingreinforcedrectanglebeamisderivedfrombalancemethodoftheinternalforcesandmoment.Thecalculatedvaluesareingoodagreementwiththeexperimentalvalue,whichcouldprovideagoodreferenceforcrackanalysisofrectangluarRCbeamsbyexternallyprestressedreinforcement.
    郭波,李峻峰,顏燕祥,等.豎張雙折線體外預應力加固RC梁抗裂分析[J].混凝土與水泥制品,2017(5):41-45. GUO B, LI J F, YAN Y X,et al.Cracks Resistance Analysis on External Prestressed Reinforced RC Beams with Double Broken Line by External Vertical Tension[J].China Concrete and Cement Products,2017(5):41-45.
    CFRP布加固后鋼筋混凝土梁的抗彎承載能力計算方法研究
    CFRP布加固后鋼筋混凝土梁的抗彎承載能力計算方法研究
    • 黎雅樂,羅 敏,高建勇,時任毅,趙 軍
    2017年第5期
    摘要
    引用本文
    摘 要:基于CFRP布加固鋼筋混凝土梁的抗彎性能試驗結果,假定梁在線彈性范圍內基本符合平截面,探索了不同方式CFRP布加固后的鋼筋混凝土梁的抗彎承載能力。結果表明,研究所得的CFRP布加固梁底面、側面時,梁的抗彎承載能力計算公式所得結果較試驗值偏大,可作為初步設計的估算公式使用。 Abstract: Based on the test results of the flexural performance of reinforced concrete beams strengthened with CFRP sheets, it is assumed that the beam is in line with the plane section within linear elastic range. Bearing capacity of reinforced concrete beam strengthened with CFRP cloth in different ways was explored. The results show that the proposed formula could estimate flexural capacity of the reinforced concrete beams bottom or side strengthened with CFRP sheets in preliminary design, for its results are larger than tests results. The research method can provide a reference for the calculating of flexural capacity of reinforced concrete beams strengthened with CFRP cloth.
    黎雅樂,羅敏,高建勇,等.CFRP布加固后鋼筋混凝土梁的抗彎承載能力計算方法研究[J].混凝土與水泥制品,2017(5):46-48. LI Y L, LUO M, GAO J Y,et al.Calculation Method Research on Flexural Capacity of Reinforced Concrete Beams Strengthened with CFRP Sheets[J].China Concrete and Cement Products,2017(5):46-48.
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