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    蘇州混凝土水泥制品研究院有限公司

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    第六期

    恒負溫自密實混凝土的研究與應用
    恒負溫自密實混凝土的研究與應用
    • 徐亞玲,覃 爽
    2014年第6期
    摘要
    引用本文
    摘 要: 隨著混凝土技術的發展,負溫混凝土的應用越來越多。針對恒負溫施工的特殊工況,結合混凝土新成熟度理論分析,采用自身防凍和輔助防凍相結合、新型添加劑等多種技術,設計恒負溫自密實混凝土配合比,并對其工作性能進行了研究,從混凝土設計、生產和施工等環節提出了一系列方法措施。 Abstract: As the development of concrete technology, subzero concrete are widely used. To satisfy the engineering requirements at subzero temperature, some technologic measures are adopted on self-compacting concrete design under constant subzero temperature, such as analyzing by new maturity theory, self anti-freezing combined additional measures and new admixture adopting. Meanwhile, the workability of concrete is researched, and some measures on design, production and construction of concrete are proposed in this paper.
    抗裂圓環的干縮應力分析——Ⅵ. 不均勻干燥時鋼芯壁厚的影響及抗裂性能判據
    抗裂圓環的干縮應力分析——Ⅵ. 不均勻干燥時鋼芯壁厚的影響及抗裂性能判據
    • 張承志1,王愛勤2,陳文耀3
    2014年第6期
    摘要
    引用本文
    摘 要:在彈性力學基本方程的基礎上,研究了不均勻干燥時鋼芯壁厚對徑向位移分布、徑向應變分布、環向應變分布、徑向應力分布和環向應力分布的影響規律,并將其結果與均勻干燥情況進行了比較。通過比較發現,當鋼芯壁厚較薄時,不均勻干燥時的最大環向拉應力大于均勻干燥時的最大環向拉應力;當鋼芯壁厚較厚時,不均勻干燥時的最大環向拉應力小于均勻干燥時的最大環向拉應力。臨界鋼芯厚度隨水泥基材料彈性模量的增大而增大。 Abstract: On the basis of the equations of elasticity, the influences of the thickness of steel core on the distribution of the radial displacement, radial strain, circumferential strain, radial stress and circumferential stress are studied under the condition of inhomogeneous drying, and the results are compared to that under the condition of homogeneously drying. It is discovered by the comparison that the maximum of circumferential tensile stress under the condition of inhomogeneous drying is larger than that under the condition of homogeneous drying if the thick of steel core is small, but the maximum of circumferential tensile stress under the condition of inhomogeneous drying is less than that under the condition of homogeneous drying if the thick of steel core is large. The critical thickness of steel core increases with the increase of the elastic modulus of cement-based material.
    石碴、電廠生物質燃料余灰復摻對水泥基材料性能影響的研究
    石碴、電廠生物質燃料余灰復摻對水泥基材料性能影響的研究
    • 李清海,王菲菲,李清原,周勝男
    2014年第6期
    摘要
    引用本文
    摘 要:對石碴等質量取代40%河砂、電廠生物質燃料余灰取代部分水泥,通過壓制成型的方法制備水泥基材料進行了研究,探索了在石碴摻量固定的前提下,同時摻加電廠生物質燃料余灰對水泥基材料強度、吸水率、抗凍融性能的影響規律。研究結果表明,在石碴取代40%天然河砂的前提下,水泥基材料的強度隨水泥被電廠生物質燃料余灰取代量的逐漸增加而先增加后降低,吸水率則呈逐漸增大的變化趨勢;在抗凍融性方面,一定摻量范圍內,石碴、電廠生物質燃料余灰復摻制備的水泥基材料滿足GB/T 50082-2009中D25抗凍等級指標要求,并對其機理進行了分析。 Abstract: According to the search of the crushed sand instead of 40% natural river sand and biomass fuels wastes instead of cement to prepare cement-based material by using the method of pressure molding, under the premise of fixed dosage of crushed sand, at the same time adding biomass fuels wastes, the effects on strength, water absorption and freezing-thaw cycle resistance of the cement-based material are explored. The results show that the strength of the cement-based material is first increases then decreases with the increase of the biomass fuels wastes dosage on the premise of crushed sand replacing 40% of the natural river sand, and the water absorption shows a trend of increase gradually changes. In a certain dosage range, the freezing-thaw cycle resistance of crushed sand and biomass fuels wastes cement-based materials can meet D25 frost resisting class indication in GB/T 50082-2009. Meanwhile, its mechanism is analyzed.
    白云石粉用作混凝土摻合料的試驗研究
    白云石粉用作混凝土摻合料的試驗研究
    • 彭 園1,高育欣1,趙日煦1,吳媛媛1,賈麗莉1,程寶軍1,霍 亮2
    2014年第6期
    摘要
    引用本文
    摘??要:研究了白云石的易磨性,并研究了粉磨30min的白云石粉等質量替代不同膠材組分對凈漿和混凝土工作性能、抗壓強度及砂漿體積穩定性的影響。結果表明,球磨30min時,白云石粉中位粒徑為2.84μm,繼續延長粉磨時間,白云石粉易團聚;在0~15%范圍內,用磨細白云石粉替代水泥、礦粉和粉煤灰可提高漿體的工作性能,但會降低抗壓強度;對于C60混凝土,摻10%磨細白云石粉可降低5kg/m3用水量,28d抗壓強度損失小于10%;白云石粉對砂漿體積收縮有一定的補償作用。?Abstract:Grindabilityofdolomitepowderisresearched.Workabilityandmechanicsofcementpasteandconcrete,volumestabilityofmortararedeterminedwhen30minsmillingdolomitepowderamountinsteadofdifferentcementitiousmaterials.Theresultsindicatethattheparticlesizeofmilling30minsdolomitepowderis2.84μm,dolomitepowdereasilyreunitesasmillingtimeincreasingcontinuously.Whenthesubstitutingcontentofdolomitepowderamountinsteadofcement,slagpowerandflyashisbetween0~15%,theworkabilityofslurryimprovesandthecompressivestrengthofcementstonedecreasesassubstitutingcontent.AstoC60concrete,5kg/m3ofwaterconsumptioncanbereducedandthelossof28dcompressivestrengthislessthan10%whenthecontentofdolomitepowderaddedtoconcreteis10%.Volumeshrinkageiscompensatedwhenthedolomitepowdermixedintomortar.
    用于鋼板剪力墻的C60混合砂混凝土試驗研究
    用于鋼板剪力墻的C60混合砂混凝土試驗研究
    • 陳 景1,林喜華2,王 斌2,劉其彬1
    2014年第6期
    摘要
    引用本文
    摘 要:結合重慶瑞安超高層項目對C60鋼板剪力墻混凝土性能的要求,通過采用重慶當地機制砂與天然河砂混合的方式,并對膠凝材料進行優選,制備出滿足工程設計要求的C60鋼板剪力墻混凝土。結果表明,機制砂與河砂比例為5∶5時,混凝土的各項性能良好且經濟合理;膠凝材料體系采用水泥、粉煤灰與硅灰組合較合理;摻入6%HCSA膨脹劑可以有效抑制混凝土的自收縮。 Abstract: Based on the requirements of C60 concrete with steel plate shearing wall by Chongqing Rui An ultra high-rise project, the C60 concrete with steel plate shearing wall is successfully prepared by optimizing cementitious system and mixed sand. The mixed sand is composed of natural river sand and manufactured sand in Chongqing area. The results show that when the proportion of manufactured sand to river sand is 5∶5, the properties of concrete are better and economical. The optimized cementitious system is composed of cement, fly-ash and silica fume. The autogenous shrinkage of concrete could be restrained by adding 6% HCSA expansion agent.
    不同活性摻合料RPC抗氯離子滲透性能試驗研究
    不同活性摻合料RPC抗氯離子滲透性能試驗研究
    • 金凌志1,何 培1,陳宜虎2
    2014年第6期
    摘要
    引用本文
    摘 要:為了研究不同活性摻合料的活性粉末混凝土(RPC)在不同養護溫度條件下的抗氯離子滲透性能,利用NEL試驗法,分別對4組不同溫度、不同活性摻合料的RPC試件進行氯離子擴散系數測定。結果表明,RPC優異的微觀結構使其具有良好的抗氯離子滲透性能;在相同養護溫度下,不同活性摻合料替代硅灰比例相同時,RPC試件抗氯離子滲透能力的大小依次為:粉煤灰>石英砂>微硅粉;同一種活性摻合料替代相同比例硅灰時,高溫養護的RPC試件,其抗氯離子滲透性能明顯優于常溫養護的RPC試件。 Abstract: In order to research the resistance to chloride ion penetration performance of reactive powder concrete(RPC) with different active admixture which works in the condition of different curing temperature, the NEL test method is used to determine the chloride ion diffusion coefficient in four groups which work on different temperature and have different active admixtures. The results show that the RPC has good properties of the resistance to chloride ion permeability because of its excellent microscopic structure. The order of the RPC specimens’ ability to resist chloride ion permeability is that: fly ash > quartz sand> silica fume which work in the same curing temperature and have the same ratio of these three active admixtures. For the same kind of active admixtures, the ability of the resistance to chloride ion permeability when the RPC specimens are cured in high temperature is better than other specimens’ when they are cured in normal temperature.
    碳化作用下?;⒅楸鼗炷撂蓟疃燃皬姸茸兓囼炑芯? />
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                          <a href="/product/1491.html" target="_parent" class="title"><i class="iconfont12"></i>碳化作用下?;⒅楸鼗炷撂蓟疃燃皬姸茸兓囼炑芯?/a>
                        
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                                      <span class="attrValue"><i class="iconfont2"></i> 呂丹丹,劉元珍,李   珠,許   麗</span>
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                                      <span class="attrValue"> 2014年第6期 </span>
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                            <span class="newMs">摘   要:為研究?;⒅楸鼗炷恋奶蓟阅?,進行了不同碳化齡期的室內快速碳化試驗。在保溫混凝土優化配合比的基礎上選定三種不同的水灰比設計試驗,測定不同齡期的碳化深度和立方體抗壓強度,并選定同等條件下的普通混凝土進行了對比。試驗結果表明,保溫混凝土的抗碳化性能較好,運用回歸分析法建立了保溫混凝土的碳化深度預測模型,確定了抗壓強度與碳化齡期之間的定量關系表達式。
Abstract: In order to study the carbonation resistance of glazed hollow beads thermal insulation concrete, accelerated carbonation experiment under different carbonization time has been conducted. The tests have been designed choosing three different water cement ratios on the basis of the optimum mixture ratio. The carbonation depth and cube compressive strength under different carbonization time have been determined, and then compared with ordinary concrete. Test results show that the insulation concrete has a good carbonation resistance. The carbonation depth prediction model has been established using the regression analysis method. And the quantitative relational expression between concrete strength and carbonation time has been determined.</span>
                         
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    使用管樁余漿生產發泡混凝土
    • 楊 牧1,陳芳斌2
    2014年第6期
    摘要
    引用本文
    摘??要:研究了使用管樁生產過程中產生的余漿作為主要原材料生產發泡混凝土的性能。結果表明,使用純余漿作為膠凝材料時,制定合適的制備工藝,可以制備出性能較好的純余漿發泡混凝土;在余漿中添加一定量的水泥,使制備的發泡混凝土密度控制在300kg/m3左右,強度可達到0.5MPa以上。Abstract:Usingtheresidualpastegeneratedfromconcretepileproductionprocessasmainmaterialfortheproductionoffoamconcrete,anddeterminingitsrelativeperformancesarestudiedinthispaper.Theresultsshowthatusingpureresidualpasteascementitiousmaterialandmakingproperpreparationtechnologycanproducethegoodpureresidualpastefoamconcrete.Andaddingacertainamountofcementinresidualpastecanproducefoamconcretewiththedensityabout300kg/m3,andthestrengthmorethan0.5MPa.
    混凝土管樁回型生產線技術改造成果介紹
    混凝土管樁回型生產線技術改造成果介紹
    • 向立軍,陳 浩,馬進元,陸 杰,張釗茂
    2014年第6期
    摘要
    引用本文
    摘 要:以混凝土管樁回型生產線為模板,對原有生產線進行了改造,并對改造后生產線的工藝流程、設備和平面布局、運行情況等作了評價。 Abstract: Based on the concrete pile back into the production line as the template, the original production line is reformed. And the technological process, equipments, plane layout and running condition of the new production line are evaluated.
    混凝土梁橋支承體系使用現狀及評估技術進展
    混凝土梁橋支承體系使用現狀及評估技術進展
    • 李宏江,李萬恒,趙尚傳,張勁泉,楊 昀
    2014年第6期
    摘要
    引用本文
    摘 要:為評價既有梁橋支承體系的技術狀況,分別以正交梁橋、斜梁橋以及彎梁橋為分析對象,系統介紹了我國混凝土梁橋支承體系的使用現狀,包括典型病害形式、病害形成機制及其對全橋結構性能的影響,闡述了現有支承體系技術狀況評價的一些措施方法,提出了今后的發展趨勢。 Abstract:Taking the orthogonal girder bridge, skew girder bridge and curved girder bridge as analysis objects, the using status on the supporting system of concrete girder bridges in China are introduced to evaluate technical condition of supporting system of the existing girder bridge, including the typical disease form, disease mechanism and its effect on the performance of the whole girder bridge structure. Some evaluation methods and means on the existing technical condition of supporting system are discussed.
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