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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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    節能與環保

    閃長玢巖的吸水特性及其對混凝土施工性能的影響研究
    閃長玢巖的吸水特性及其對混凝土施工性能的影響研究
    • 潘金敢1,王子龍1,柏立果1,程 猛2,毛永琳2
    2021年第10期
    摘要
    引用本文
    摘 ? 要:測試了閃長玢巖的吸水特性,研究了閃長玢巖作為粗骨料對混凝土施工性能的影響。結果表明:閃長玢巖碎石內部的裂隙、孔隙較發達,吸水率高,但吸水速率慢;閃長玢巖的摻入使得混凝土拌合物的流動性損失顯著增加,泌水率降低;采用骨料預濕工藝和摻減水劑的方法可以解決閃長玢巖混凝土的施工性能問題。 Abstract: The water absorption characteristics of diorite porphyrite was tested, and its influence on the construction performance of concrete was studied. The results show that the fissures and pores in the diorite porphyrite are relatively developed, and the water absorption is high, but the water absorption rate is slow. The addition of diorite porphyrite significantly increases the fluidity loss of concrete mixture and reduces the bleeding rate. The problem of construction performance of diorite porphyrite concrete can be solved by using aggregate pre-wetting technology and adding water reducing agent.
    潘金敢,王子龍,柏立果,等.閃長玢巖的吸水特性及其對混凝土施工性能的影響研究[J].混凝土與水泥制品,2021(10):95-99. PAN J G,WANG Z L,BAI L G,et al.Study on Water Absorption Characteristics of Diorite Porphyrite and Its Influence on the Construction Performance of Concrete[J].China Concrete and Cement Products,2021(10):95-99.
    納米SiO2對摻膨脹劑堿礦渣砂漿力學及收縮性能的影響
    納米SiO2對摻膨脹劑堿礦渣砂漿力學及收縮性能的影響
    • 田 翔,陳佩圓,婁 星,李 進
    2021年第10期
    摘要
    引用本文
    摘 ? 要:研究了納米SiO2摻量對摻膨脹劑堿礦渣砂漿抗壓強度、自收縮、干燥收縮和孔隙率的影響。結果表明:膨脹劑的摻入有助于減少堿激發礦渣砂漿的自收縮和干燥收縮,但會顯著降低早期強度;摻入2%納米SiO2可基本補償由于摻入膨脹劑造成的強度損失,且對堿礦渣砂漿自收縮和干燥收縮的影響較??;適量納米SiO2的摻入可顯著降低摻膨脹劑堿礦渣砂漿的孔隙率。 Abstract: The effects of nano-SiO2 content on the compressive strength, self-shrinkage, dry shrinkage and porosity of the alkali-activated slag mortar(AASM) with expansion agent were analyzed. The results show that the addition of expansive agent can reduce the self-shrinkage and dry shrinkage of AASM, but can significantly reduce its early strength. The addition of 2% nano-SiO2 can basically compensate the strength loss caused by the addition of expansive agent, and has little effect on the self-shrinkage and dry shrinkage of AASM. Appropriate amount of nano-SiO2 can significantly reduce the porosity of AASM with expansion agent. ?
    田翔,陳佩圓,婁星,等.納米SiO2對摻膨脹劑堿礦渣砂漿力學及收縮性能的影響[J].混凝土與水泥制品,2021(10):91-94. TIAN X,CHEN P Y,LOU X,et al.Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent[J].China Concrete and Cement Products,2021(10):91-94.
    廢玻璃粉對高延性水泥基復合材料性能的影響
    廢玻璃粉對高延性水泥基復合材料性能的影響
    • 李碧雄,張治博,汪知文
    2021年第10期
    摘要
    引用本文
    摘 ? 要:采用粒徑為75~300 μm的廢玻璃粉取代部分河砂制備了高延性水泥基復合材料(HDCC),研究了廢玻璃粉取代率(10%、20%、30%)對HDCC抗壓、抗拉和抗彎性能以及流動性的影響。結果表明:廢玻璃粉的摻入提高了HDCC的流動度;HDCC的抗壓強度隨廢玻璃粉取代率的增加而增大;當廢玻璃粉取代率為10%時,HDCC的拉伸性能略有改善,取代率繼續增大時,抗拉性能劣化;隨廢玻璃粉取代率的增加,HDCC的彎曲韌性降低,裂縫數量減少,裂縫寬度增大。此外,拉伸過程中廢玻璃粉對PVA纖維有刮傷,削弱了PVA纖維的拉伸性能,導致HDCC的抗拉強度和抗彎強度降低。 Abstract: High ductility cementitious composites (HDCC) were prepared by replacing part of river sand with waste glass powder with a particle size of 75~300 μm, and the effects of waste glass powder replacement rates(10%、20%、30%) ?on the compressive, tensile and flexural properties and fluidity of HDCC were studied. The results show that the fluidity of HDCC is improved by adding waste glass powder. The compressive strength of HDCC increases with the increase of waste glass powder replacement rate. When waste glass powder replacement rate is 10%, the tensile properties of HDCC are slightly improved, and the tensile properties are deteriorated when the replacement rate continues to increase. With the increase of waste glass powder replacement rate, the bending toughness of HDCC decreases, the number of cracks decreases and the width of cracks increases. In addition, the waste glass powder scratches PVA fiber during the tensile process, which weakens the tensile properties of PVA fiber, thus resulting in the decrease of tensile strength and bending strength of HDCC.
    李碧雄,張治博,汪知文.廢玻璃粉對高延性水泥基復合材料性能的影響[J].混凝土與水泥制品,2021(10):86-90,94. LI B X,ZHANG Z B,WANG Z W.Influence of Waste Glass Powder on the Properties of High Ductility Cementitious Composites[J].China Concrete and Cement Products,2021(10):86-90,94.
    瀝青攪拌站廢粉對混凝土力學與耐久性能的影響研究
    瀝青攪拌站廢粉對混凝土力學與耐久性能的影響研究
    • 張蘭峰1,王恒昌2,藍亞明3,胡 勝1,鄧再桔1
    2021年第10期
    摘要
    引用本文
    張蘭峰,王恒昌,藍亞明,等.瀝青攪拌站廢粉對混凝土力學與耐久性能的影響研究[J].混凝土與水泥制品,2021(10):81-85. ZHANG Lan-feng, WANG Heng-chang, LAN Ya-ming,et al.Study on the Effect of Waste Powder From Asphalt Mixing Station on the Mechanical and Durability of Concrete[J].China Concrete and Cement Products,2021(10):81-85.
    不銹鋼管與鋼纖維增強再生混凝土組合柱的軸壓性能研究
    不銹鋼管與鋼纖維增強再生混凝土組合柱的軸壓性能研究
    • 黃 波1,張 亮2,翟江棚3
    2021年第10期
    摘要
    引用本文
    摘 ? 要:研究了不同再生骨料替代率下,不銹鋼管與鋼纖維增強再生混凝土組合柱的軸壓性能,獲得了試件的破壞形態、荷載-位移曲線和軸壓剛度。結果表明:根據荷載-位移曲線的變化特征,可將試件按承載力穩定性分為不穩定和穩定兩類;不穩定試件峰值荷載后的荷載-位移曲線快速探底,此后荷載開始緩慢提升,軸向變形快速增大;穩定試件峰值荷載后的荷載-位移曲線沿水平方向發展,試件的持荷能力突出;試件的軸壓剛度在0.3~0.9倍的峰值荷載時達到最大,此時鋼與混凝土的材料損傷相對較小,鋼管對混凝土的約束效應相對有效;隨著再生骨料替代率的增大,試件的軸壓剛度逐漸降低;鋼纖維抑制了裂縫的發展,維護了混凝土的整體性,從而提高了試件的軸壓剛度。 Abstract: The axial compression performance of stainless steel pipe and steel fiber reinforced recycled concrete composite columns with different recycled aggregate replacement rates was studied, and the failure mode, load-displacement curve and axial compression stiffness were obtained. The results show that according to the characteristics of load-displacement curve, the specimens can be divided into unstable and stable types according to the bearing capacity stability. The load-displacement curve of the unstable specimen after the peak load quickly reaches the bottom, after which the load starts to increase slowly, and the axial deformation increases rapidly. The load-displacement curve of the stable specimen ?after the peak load develops in the horizontal direction, and the load-holding capacity of the specimen is outstanding. The axial compression stiffness of the specimen reaches the maximum when the load is 0.3~0.9 times of the peak load, and at this time, the material damage of steel and concrete is relatively small, and the restraint effect of steel pipe on concrete is relatively effective. With the increase of the replacement rate of recycled aggregate, the axial compression stiffness of the specimen decreases gradually. The steel fiber inhibits the development of cracks and maintains the integrity of the concrete, thereby improving the axial stiffness of the specimen.
    黃波,張亮,翟江棚.不銹鋼管與鋼纖維增強再生混凝土組合柱的軸壓性能研究[J].混凝土與水泥制品,2021(10):77-80. HUANG B,ZHANG L,ZHAI J P.Study on Axial Compression Performance of Stainless Steel Pipe and Steel Fiber Reinforced Recycled Concrete Composite Columns[J].China Concrete and Cement Products,2021(10):77-80.
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