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    蘇州混凝土水泥制品研究院有限公司

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    第三期

    鋰渣超細粉作混凝土用礦物外加劑的試驗研究
    鋰渣超細粉作混凝土用礦物外加劑的試驗研究
    • 黃 陽,王 瑜,王維清,楊 群,馮啟明,徐中慧,顏翠平
    2016年第3期
    摘要
    引用本文
    摘??要:利用氣流粉碎機將鋰渣加工成三種不同細度的超細粉,研究了鋰渣超細粉的粒度分布、活性指數、摻量、水化熱等技術指標。結果表明,平均粒徑分布為5.55μm、4.32μm和2.96μm的三種鋰渣超細粉的比表面積分別達到9.39m2/g、11.81m2/g和13.80m2/g,28d活性指數分別達到102.8%、104%和107%,但3d和7d的活性指數低于90%,這說明鋰渣超細粉活性較高,但水化反應速率較慢。摻入鋰渣超細粉的水泥水化熱顯著降低,超細加工有利于提升鋰渣的性能。Abstract:Lithiumslagisprocessedintothreekindsofultrafinepowdersbyairflowsplinteredmachine.Thetechnologyindexasparticlesizedistribution,dosage,activityindexandhydrationheatofultrafinelithiumslagareinvestigated.Theresultsshowthat,theaverageparticlesizeofthreekindsofultrafinelithiumslagis5.55μm,4.32μmand2.96μm,andspecificsurfaceareais9.39m2/g、11.81m2/gand13.80m2/g,respectively.The28-dayactivityindexis102.8%,104%and107%,respectively.However,3-dayactivityindexand7-dayactivityindexarelowerthan90%whichindicatestheactivityoftheultrafinelithiumslagishighandthereactionrateisslow.Atthesametime,thehydrationheatofthecementmixedwithultrafinelithiumslagissignificantlydecreased.Obviously,ultra-fineprocessingisbeneficialtoimprovetheperformanceoflithiumslag.
    磷渣-磷尾礦制備硅酸鈣板的研究
    磷渣-磷尾礦制備硅酸鈣板的研究
    • 梁興榮1,2,薛 俊2,曹 宏2
    2016年第3期
    摘要
    引用本文
    摘 要:通過對比不同粒度磷渣作為膠凝材料的火山灰活性、磷尾礦作為惰性填料和將磷尾礦處理后物料制備硅酸鈣板制品,結果表明,S95級磷渣28d火山灰活性指數>90%;磷尾礦作為惰性填料制備出的制品抗折強度<6MPa且尾礦的摻量<10%;磷尾礦處理后物料制備出制品抗折強度>9MPa且配比中廢棄物的摻量>40%,制品抗折強度隨著保溫時間延長逐漸降低,最佳保溫時間為6h。 Abstract: Preparation calcium silicate board by using solid waste from phosphorus chemical industry, the volcanic activity of different particle size of phosphorus slag as cementitious material is compared, phosphorus tailings as inert fillers and calcium silicate board is prepared by materials after phosphorus tailings had processed. The results show that, level S95 phosphorus slag of 28d volcanic activity index is more than 90%; flexural strength of the product which is prepared by phosphorus tailings as inert filler is less than 6MPa and the tailings content is less than 10%; flexural strength of the product which is prepared after phosphorus tailings had processed is more than 9MPa and the tailings content is more than 40%, the flexural strength of the products is gradually decreased with the prolonging of holding time, the optimal holding time is 6h.
    隧道襯砌混凝土覆膜自動控制蒸汽養護施工技術
    隧道襯砌混凝土覆膜自動控制蒸汽養護施工技術
    • 石迎新
    2016年第3期
    摘要
    引用本文
    摘 要:近年來在隧道二襯混凝土的回彈檢測中,時有因養護不到位而影響混凝土質量,或因養護方法不當導致二襯混凝土表面開裂等情況的出現。針對此情況,固西公路炸嘴山隧道研發了蒸汽覆模養護技術,系統主要由養護罩、蒸汽系統和控制系統三部分組成,實現了對隧道襯砌混凝土采取蒸汽高溫養護和標準養護兩個階段,取得了很好的效果。 Abstract: In springback inspection for tunnel lining concrete in recent years, the situation of tunnel lining concrete surface cracking is produced by not reaching curing or improper curing method. Aiming this situation, steam mulching model curing technology is researched in Guxi highway Zhazui mountain tunnel, that system mainly consists three parts of curing cover, steam system and control system, two stages that contains steam high temperature and standard curing are reached for tunnel lining concrete, which can achieve good effects.
    U形混凝土板樁振動沉樁工藝研究
    U形混凝土板樁振動沉樁工藝研究
    • 朱建舟1,張后禪2
    2016年第3期
    摘要
    引用本文
    摘 要:介紹了U形混凝土板樁振動沉樁工藝原理、特點及振動沉樁阻力計算和振動錘的設備選型計算,并對U形混凝土板樁的沉樁施工工藝及流程進行了闡述,提出了U形混凝土板樁振動沉樁的幾種施工順序組織方法。 Abstract: Technology principle, characteristic of U-shaped concrete sheet vibratory sinking pile, the sinking resistance calculation of vibratory sinking pile and equipment selection calculation of vibratory hammer are introduced, sinking construction process and construction process of U-shaped concrete sheet sinking pile are elaborated. Several kinds of construction organization method of U-shaped concrete sheet vibratory sinking pile are put forward.
    JG/T 477—2015《混凝土塑性階段水分蒸發抑制劑》標準解讀
    JG/T 477—2015《混凝土塑性階段水分蒸發抑制劑》標準解讀
    • 李 磊1,2,王 偉1,2,田 倩1,2,劉加平1,2
    2016年第3期
    摘要
    引用本文
    摘 要:JG/T 477—2015《混凝土塑性階段水分蒸發抑制劑》已于2016年1月1日開始實施。為便于準確貫徹實施該標準的具體要求和規定,本文介紹了JG/T 477—2015標準的編制背景、編制目的和意義,并對其主要條款作了解讀。 Abstract: The construction industry products industry standard JG/T 477—2015 Evaporation retardants for concrete during plastic stage was officially issued, which was implement on January 1st, 2016. As a new standard, in order to carry out and implement the specifications of the standard reasonably and scientifically for the users, the establishing background, purpose and meanings of the standard are introduced, and the main issues of the standard are interpreted.
    憎水劑對超輕發泡混凝土性能的影響研究
    憎水劑對超輕發泡混凝土性能的影響研究
    • 何順愛1,朱曉燕2
    2016年第3期
    摘要
    引用本文
    摘??要:以普通硅酸鹽水泥與硫鋁酸鹽水泥為膠凝材料,采用物理發泡工藝制備了干密度小于300kg/m3的發泡混凝土,研究了三種憎水劑對發泡混凝土抗壓強度、體積吸水率及孔結構的影響。研究表明:憎水劑摻量增加,試樣7d及28d抗壓強度先增加后降低,憎水劑硬脂酸鈣相對于苯丙乳液及有機硅,對試樣干密度及氣孔結構影響最小,體積吸水率降低最為明顯;當硬脂酸鈣摻量為2.5%時,干密度為274.1kg/m3的試樣28d抗壓強度為0.65MPa,體積吸水率為8.6%。Abstract:ForordinaryPortlandcementandsulphoaluminatecementascementitiousmaterials,foamedconcretefordrydensitylessthan300kg/m3ispreparedbyphysicalfoamingprocess,theinfluenceofthreekindsofwaterrepellentsoncompressivestrength,volumewaterabsorptionandporestructureisinvestigated.Theresultsindicatethat,withtheincreasingdosageofwaterrepellent,thecompressivestrengthofsampleswith7daysand28daysisincreasedatfirstthendecreased,comparedwithstyrene-acrylateemulsionandorganicsilicon,theeffectofcalciumstearateondrydensityandporestructureofsamplesistheleast,andvolumewaterabsorptionisdecreasedsignificantly.Whenthedosageofcalciumstearateis2.5%,thedrydensityofsampleis274.1kg/m3,thecompressivestrengthin28daysachieves0.65MPaandthevolumewaterabsorptionis8.6%.
    新型節能承重砌塊砌體抗剪強度試驗研究
    新型節能承重砌塊砌體抗剪強度試驗研究
    • 武義馨,劉福勝,趙井輝,周 濤,溫福勝
    2016年第3期
    摘要
    引用本文
    摘 要:通過對三組(18個試件)新型節能承重混凝土空心砌塊砌體進行了抗剪試驗研究,分析了該種新型混凝土砌塊砌體的變形特征、開裂荷載及極限荷載;揭示了該種新型混凝土砌塊砌體抗剪強度影響因素及剪切破壞機理;對現行規范中的抗剪強度計算公式進行了回歸分析,得到的計算值與試驗值吻合良好,為工程實踐提出了參考。 Abstract: The experimental study of shear strength is carried out by 3 groups (18 shear specimens ) of new composite concrete block masonry for load-bearing and energy conservation, the deformation characteristic, cracking load and ultimate load of this new concrete block masonry are analyzed; the influencing factors for shear strength and shear failure mechanism of new concrete block masonry are revealed, meanwhile, the shear strength formula in current code for design of masonry structures is made for regression analysis for engineering practice recommendations which the calculating results are in good agreement with the test results.
    銹蝕預應力筋混凝土梁受彎承載性能有限元分析
    銹蝕預應力筋混凝土梁受彎承載性能有限元分析
    • 唐 碩1,喻孟雄2,丁權福1,徐曉燕3,明 勇1
    2016年第3期
    摘要
    引用本文
    摘 要:利用ANSYS建立了預應力混凝土梁分離式有限元模型,實現了預應力筋銹蝕后混凝土構件靜力承載性能的模擬,分析了預應力筋銹蝕對預應力混凝土構件極限承載力、剛度和破壞形式的影響。結果表明:隨著預應力筋銹蝕率的增加,構件的極限荷載和剛度降低,梁頂應變增加,塑性變形能力變差,破壞由延性向脆性發展。 Abstract: Finite element model with disconnect-type of prestressed reinforced concrete beams is established by using ANSYS, the simulation of static load capacity for prestressed tendons with corroded concrete member is achieved, the influence of corroded prestressed tendons on ultimate bearing capacity, stiffness and destructional forms of prestressed concrete members are analyzed. The results show that, with the increase of corrosion rate of prestressed tendons, the ultimate load and stiffness of the member are decreased, meanwhile, the strain of beam is increased, the plastic deformation ability becomes worse, and the failure is developed from the ductile to brittle.
    多孔砌塊外墻孔內自然通風的熱過程分析
    多孔砌塊外墻孔內自然通風的熱過程分析
    • 黃吳畏1,張蘭英2,史世英3,孫偉民1,何嘉鵬1
    2016年第3期
    摘要
    引用本文
    摘 要:基于物理模型,利用MATLAB軟件模擬分析了北京和南京地區民用建筑南外墻在夏季典型氣候與太陽輻射共同作用下,在結合了絕熱材料(EPS)的三排孔砌塊中,自然通風對室內的熱影響。結果表明:北京地區隨著樓層的升高,其節能的效果呈現先升高后降低的趨勢,存在一個峰值接近90%;南京地區隨著樓層的升高,其節能效果呈現下降的趨勢,在3層時為最高值在60%~70%之間。北京通風墻體的熱阻相較不通風時的墻體熱阻,最高可提高43.4%,最低提高28.4%;南京通風墻體的熱阻相較不通風時的墻體熱阻,最高提高了23.2%,最低提高了13.7%。通風墻體在北京更加適用于中高層民用建筑,而在南京更加適用于多層民用建筑。 Abstract: Based on physical model, combined effect of a typical summer climate and solar radiation, the simulation for south wall of civil architecture in Nanjing and Beijing is analyzed by MATLAB software that the indoor heat influence of the natural ventilation is effected, combined with thermal insulation material (EPS) in different combination of the three-hole block. The results show that, the energy saving effect is increased at first and then decreased in Beijing as the rising floor in Beijing area, meanwhile, a peak value is nearly 90%; however in Nanjing the trend of the energy saving effect appears fallen along with the increase of floor, there is a peak value between 60% and 70% at the three floor. When the thermal resistance of the wall is unventilated, the highest thermal resistance of the wall in Beijing is increased by 43.4% and the lowest thermal resistance is increased by 28.4%; compared with in Nanjing, the highest thermal resistance of the wall is increased 23.2% and the lowest of that is increased 13.7%. Therefore, the ventilation wall is more suitable for the high-rise building in Beijing, that is more suitable for multiple-story building.
    玻璃纖維與聚合物復摻改性水泥砂漿的研究
    玻璃纖維與聚合物復摻改性水泥砂漿的研究
    • 高 妮1,喻剛強2, 趙亞麗1,薛振華1,何文敏1
    2016年第3期
    摘要
    引用本文
    摘 要:在固定水灰比為0.4條件下,對比了玻璃纖維、聚乙烯醇乳液單摻與復摻時對水泥砂漿抗折、抗壓強度的影響,同時研究了復摻情況下玻璃纖維的表面狀況及其耐堿腐蝕能力。結果表明,玻璃纖維與聚合物乳液復摻時,水泥砂漿的抗壓強度和抗折強度較聚合物單摻都有小幅度增加,在纖維摻量為水泥質量的1.0%、聚灰比為7.5%時,玻璃纖維聚合物水泥砂漿的柔性最大,纖維-聚合物復摻能夠使其性能得到進一步改善,效果優于兩者的單摻效果。通過耐堿性試驗及掃描電鏡分析探討了玻璃纖維與聚合物乳液復摻時對纖維耐堿性能的影響,結果表明,兩者復摻可有效填充水泥基材料內部的宏觀與微觀缺陷,提高界面過渡區的密實程度。 Abstract: The influence on flexural strength and the compressive strength of cement mortar is compared with single-mixed and double-mixed glass fiber and polyvinyl alcohol emulsion,under water-cement ratio of 0.4. Meanwhile, the glass fiber surface condition and alkali corrosion resistance ability are studied in double mixed with glass fiber and polyvinyl alcohol emulsion. The results show that, the compressive strength and flexural strength of cement mortar are slightly increased as glass fiber mixed with polyvinyl alcohol emulsion, when fiber content is 1% of cement quality and the ratio of polymer cement mortar is 7.5%, the flexible of glass fiber polymer modified cement mortar is the maximum, the performance can be further improved by mixed with fiber-polymer, which the effects of double-mixed fiber and polymer is better than single-mixed fiber and polymer. Through alkali resistance test and scanning electron microscope (SEM), the influence on alkali resistance of fiber as double mixed glass fiber and polyvinyl alcohol emulsion, the results indicate that, the macro and micro defects of cement-based materials can be effectively filled as double mixed glass fiber and polyvinyl alcohol emulsion, and the density degree of the interface transition zone has been improved.
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