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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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    第一期

    機制砂配制泵送防水混凝土的研究和應用
    機制砂配制泵送防水混凝土的研究和應用
    • 李 果1,白文輝2
    2013年第1期
    摘要
    引用本文
    摘??要:針對隧道二次襯砌混凝土對強度要求較低,對抗滲要求較高的情況,用低成本的含石粉機制砂,配制出了強度等級為C25,抗滲等級為P8的泵送混凝土。試驗表明,機制砂中石粉含量為12%~14%時,配制出的混凝土強度較高;石粉含量為8%~16%時,能滿足使用要求。Abstract:Aimingatthesituationthatthelowerstrengthbuthigherpermeabilityresistancerequirementsforthetunnelsecondaryliningconcrete,theC25pumpingconcretewithP8permeabilityresistanceispreparedwiththelowcoststonepowdermanufacturedsand.Theexperimentshowsthatwhenthecontentofstonepowderis12%~14%,thestrengthofconcreteishigher,andwhenthecontentofstonepowderis8%~16%,theconcretecansatisfytheapplicationdemand.
    高強鋼筋連接技術的選擇與應用
    高強鋼筋連接技術的選擇與應用
    • 佟愛玲1,鄧燕華1,趙蘇玲2,鄧龍龍2
    2013年第1期
    摘要
    引用本文
    摘 要:針對目前粗鋼筋連接技術發展迅猛的狀況,總結、歸納了各類粗鋼筋螺紋連接方法的特點、要點以及各自的適用范圍。 Abstract: Aimed at the rapid development of the crude reinforced connection technology at present, the character, key point and their application scope of many kinds of the crude reinforced thread connection methods are summarized and concluded.
    鋼棒切斷機的選型與使用
    鋼棒切斷機的選型與使用
    • 趙瑞軍
    2013年第1期
    摘要
    引用本文
    摘 要:分析了固定式鋼棒切斷機和連續式鋼棒切斷機的工作原理及對鋼棒切斷速度、切斷精度的不同影響,并對提高切斷機的切斷質量提出了相關建議。 Abstract:The work principles of stationary steel bar cutting machine and continuous steel bar cutting machine and different influence of the two steel bar cutting machines on cutting speed, cutting precision of the steel bar are analyzed, and some suggestions about how to improve cutting quality of the cutting machine are put forward.
    高保水性砌筑水泥性能的研究
    高保水性砌筑水泥性能的研究
    • 楊 錚1,郭文瑛1,彭啟冬1,陳彬彬1,彭程緯1,楊醫博1,2,王恒昌1
    2013年第1期
    摘要
    引用本文
    摘 要:高保水性砌筑水泥是一種新型的專用水泥,其制備砂漿的性能與預拌砂漿相近,但能耗和成本較預拌砂漿低。研究了高保水性砌筑水泥及其砂漿的保水率、抗壓強度、拉伸粘結強度和收縮性等性能,參考我國砌筑水泥和砂漿的相關標準,提出高保水性砌筑水泥的性能指標,為高保水性砌筑水泥廣東省地方標準的編制提供依據。 Abstract: The high water retention masonry cement is a new type of special cement, and the mortar made of it has the same performances as the ready-mixed mortar, while the energy consumption and cost of it can be reduced a lot. In this paper the water-retention, compressive strength, tensile bond strength and shrinkage ratios of high water retention masonry cement and mortar made of it are studied. And combined with the ready-mixed mortar standard and the masonry cement specifications, the performances indexes of high water retentive masonry cement are put forward as a reference for high water retention masonry cement standard of Guangdong Province.
    利用自振周期進行混凝土梁損傷程度識別的試驗驗證
    利用自振周期進行混凝土梁損傷程度識別的試驗驗證
    • 王 卓
    2013年第1期
    摘要
    引用本文
    摘 要:對混凝土梁式結構的健康狀況進行檢測鑒定,首先需要掌握其系統參數關于結構損傷的演化規律,以便進行有的放矢的檢測和得到可靠的鑒定結果。本文以混凝土簡支梁為例,通過靜力加載試驗模擬梁的損傷累積過程,通過突加荷載試驗跟蹤梁自振周期隨加載損傷等級的變化,深入分析了這些變化的發生機理,并提出了一種基于自振周期的結構損傷程度識別指標。 Abstract: For the detection and evaluation of concrete beam structure, the evolution rule of its system parameters about structure damage should be grasped firstly. Then, the results of detection and evaluation may be reliable. In this paper, taking a simple supported concrete beam as an example, the accumulated damage of the beam is simulated by a static loading test, and the change of natural vibration period with loading damage is tracked by a shock loading test. The mechanism of the changes is analyzed, and an identification index of damage severity based on natural vibration period is presented.
    鋼筋混凝土結構高溫抗火性能研究
    鋼筋混凝土結構高溫抗火性能研究
    • 鄭海波
    2013年第1期
    摘要
    引用本文
    摘 要:基于目前國內外的研究成果,以鋼筋混凝土結構為研究對象,對鋼筋混凝土材料的熱工性能、力學性能以及高溫粘結性能進行了研究分析;運用灰色系統理論對影響混凝土高溫粘結性能的各因素進行了灰關聯度分析。 Abstract: Based on the current domestic and international research results, taking the reinforced concrete beams as the study object, the reinforced concrete thermal properties, mechanical properties and high temperature bonding properties are researched and analyzed. The gray system theory is used for the impact factors of concrete high-temperature bonding performance, and the gray correlation analysis is carried out.
    往復荷載作用下區域約束混凝土柱的抗震性能試驗
    往復荷載作用下區域約束混凝土柱的抗震性能試驗
    • 彭 景1,孫芳寧2,龐新賓3,陳 虎4
    2013年第1期
    摘要
    引用本文
    摘 要:為比較區域約束與傳統約束的差異,對6根混凝土柱(傳統約束混凝土柱和區域約束混凝土柱各3根)進行了不同軸壓比下的周期往復荷載試驗。區域約束混凝土采用區域約束與整體約束相結合的約束方式,箍筋與縱筋共同作用,約束效力更高。試驗結果表明,即使在高軸壓比下,區域約束混凝土也有較好的承載能力和變形能力,極限狀態為延性破壞。區域約束混凝土的應用可有效提高建筑結構抗震性能,具有推廣應用價值。 Abstract: In order to compare the differences between the regional constraint and normal constraint, tests are done on 6 concrete columns under low cyclic loading mode, while half of them are normal confined concrete(NCC) columns, and the others are regional confined concrete(RCC) columns. The regional constraint is used by regional constraint and total constraint, and the longitudinal steel and stirrup action together, confinement in RCC columns is more efficient than that in NCC columns. Test results indicate that the mechanical properties of RCC columns is better than NCC columns, and they are more ductile and more reliable even under high axial compression ratio. It can be expected that the application of RCC may effectively improve the seismic behavior of structures.
    鋼纖維活性粉末混凝土力學性能試驗研究
    鋼纖維活性粉末混凝土力學性能試驗研究
    • 曹 霞1,金凌志1,付 強1 ,鄧 寧2
    2013年第1期
    摘要
    引用本文
    摘??要:通過對摻入鋼纖維的活性粉末混凝土不同尺寸試件,以及在相同尺寸前提下有無摻入鋼纖維的試件進行了抗壓強度和抗折強度等力學性能試驗研究,探討了尺寸效應以及鋼纖維對試件抗壓、抗折強度的影響,在對摻入鋼纖維混凝土試件進行彈性模量試驗的基礎上,得出其與抗壓強度的關系。結果表明,尺寸效應對活性粉末混凝土的抗壓強度影響較大,對抗折強度影響較??;而鋼纖維的摻入能較大地提高活性粉末混凝土的抗折強度,改善其脆性大的性質。Abstract:Basedonthemechanicalpropertytestsstudyofcompressiveandflexuralstrengthonthedifferentsizespecimenofreactivepowderconcrete(RPC)withsteelfiberandthesamesizespecimenofRPCwithsteelfiberornot,theeffectsofsizeeffectandsteelfiberonthecompressiveandflexuralstrengthofspecimenarediscussed.Andtheelasticmodulusexperimentofconcretespecimenwithsteelfiberiscarriedout,andtherelationshipbetweenthecompressivestrengthandelasticmodulusisobtained.TheresultsshowthatthesizeeffecthasgreaterimpactonthecompressivestrengthofRPCthantheflexuralstrength.Meanwhile,thesteelfibercangreatlyimprovetheflexuralstrengthandthebrittlenessofRPC.
    聚酯纖維引氣道面混凝土凍融強度試驗研究
    聚酯纖維引氣道面混凝土凍融強度試驗研究
    • 翁興中1, 沈 哲2,李永毅2,胡栓科3
    2013年第1期
    摘要
    引用本文
    摘 要:北方機場道面水泥混凝土對抗凍性和強度的要求較高,在引氣混凝土中摻入聚酯纖維,可在滿足混凝土抗凍性要求的同時,提高混凝土的強度。試驗表明,聚酯纖維摻量存在著最佳含量。在該摻量下,可以有效地提高混凝土凍融后的抗壓、劈裂和抗彎拉強度。 Abstract: Because of the high requirement for the frost resistance and strength of pavement concrete in Northern airport, the polyester fiber is used into air-entrained concrete to improve the frost resistance and strength of concrete. The test results show that the polyester fiber has the optimum content. The compressive, the splitting and the bending strengths of concrete are improved with this optimum dosage.
    纖維對混凝土抗裂性能影響的有限元分析
    纖維對混凝土抗裂性能影響的有限元分析
    • 俞家歡1 ,劉振民1,劉 明1 ,李春雨2
    2013年第1期
    摘要
    引用本文
    摘 要:以鋼纖維在受力方向均勻分布的纖維混凝土板為模型,對不同載荷、不同纖維長徑比的幾個算例進行了ANSYS有限元分析。各個情況下纖維和基體應力和應變情況的對比研究表明,裂紋的開裂擴展由基體的材料性能決定,纖維混凝土與基體材料具有相同的彈性階段,纖維的作用在基體開裂后才能得到充分發揮。此外,纖維在混凝土硬化過程中的主要效應為降低塑性裂紋和內部微裂紋的數量和尺度,提高混凝土材料介質的連續性,并最終改善混凝土的綜合性能。 Abstract:The ANSYS finite element analysis of several examples with the different loads, different fiber aspect ratio is carried out, through the evenly distributed fiber reinforced concrete slabs with steel fiber in the direction of the force as the model. Compared with the stress and strain of fiber and concrete in each case, the results show that crack extension of the crack is determined by the material properties of the matrix, fiber reinforced concrete and the base material have the same elastic stage, the role of the fiber can give a full play after cracking of the base body. In addition, the main effect of the fiber in the concrete hardening process is to reduce the number and scale of plastic cracks and micro-cracks, improve the continuity of the concrete material medium, and ultimately improve the overall performance of the concrete.
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