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    蘇州混凝土水泥制品研究院有限公司

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    第十二期

    再生水泥穩定碎石基層材料收縮及疲勞性能試驗研究[J].混凝土與水泥制品
    再生水泥穩定碎石基層材料收縮及疲勞性能試驗研究[J].混凝土與水泥制品
    • 顧 萬,肖 鵬,楊宇軒,劉安安
    2018年第12期
    摘要
    引用本文
    摘 要:以揚州某快速通道改擴建項目為依托,對于原“白加黑”復合式道路銑刨、破碎產生的舊瀝青混凝土(RAP)和舊水泥混凝土(RA)進行再生水泥穩定碎石基層材料的適用性研究,將天然骨料(NA)、RA、RAP分別以不同比例摻配設計了9組不同的再生水泥穩定碎石,通過水泥穩定碎石干縮試驗、溫縮試驗和彎拉疲勞試驗,分析其收縮機理和抗疲勞性能。研究表明,RA材料的摻入會降低材料的收縮性能,在水泥穩定碎石中混入RAP材料后能夠降低材料對水和溫度的敏感性,提升材料的收縮性能。RAP材料中瀝青的有效成分能夠增強水泥穩定碎石材料間的嵌擠作用,提高材料的均勻性和整體性,提高水泥穩定碎石的抗疲勞性能。 Abstract: Based on the reconstruction and expansion project of southern Yangzhou, the applicability of the original "white plus black" compound road milling, broken old asphalt concrete (RAP) and old cement concrete (RA) for recycled cement stabilized macadam base material was studied, and NA, RA and RAP were designed with different proportions of 9, respectively. The shrinkage mechanism and fatigue properties of the cement stabilized macadam were analyzed by the dry shrinkage test of cement stabilized macadam, the temperature shrinkage test and the flexural fatigue test. The study shows that RA can reduce the shrinkage property of the material, and after mixing with RAP in the cement stabilized macadam, the sensitivity of the material to water and temperature can be reduced and the shrinkage performance of the material is improved. The effective composition of asphalt in RAP material can enhance the inlay and extrusion of cement stabilized macadam material, improve the uniformity and integrity of the material, and improve the fatigue resistance of the cement stabilized macadam.
    內摻再生磚粉濕拌砂漿制備與力學強度研究[J].混凝土與水泥制品
    內摻再生磚粉濕拌砂漿制備與力學強度研究[J].混凝土與水泥制品
    • 陶李堯1,羅健林1,2,3,李秋義1,2,3,劉 超1
    2018年第12期
    摘要
    引用本文
    摘 要:結合內摻法,研究了不同膠砂比(B/S)(1∶4、1∶5、1∶6)、不同稠度[(70±10) mm、(90±10) mm、(100~115) mm)情況下,粉煤灰(FA)與再生磚粉(RBP)(摻量20%、30%、40%)對改性再生砂漿(RBFM)28 d抗壓強度的影響,探討了RBP取代水泥的可行性。結果表明,相比FA體系,RBFM的28 d抗壓強度均出現不同程度的下降,當B/S為1∶5,RBP摻量為30%,稠度為70 mm時,28 d抗壓強度下降幅度最大,達到32.74%,但依然可達M5級砂漿要求,可滿足大多數砌筑工程需要。 Abstract: Combined with the mixed method, pre-mixed mortars (RBFM) were studied under the conditions of same Binder-sand ratio (B/S) (1∶4, 1∶5, 1∶6) and consistency [(70±10) mm, (90±10) mm, (100~115) mm], by replacing (20%,30%, 40%) with fly ash (FA) and renewable brick powder influence of 28 d compressive strength , and the feasibility of cement partially replacing with renewable brick powder on pre-mixed mortar was also discussed. Results show that the recycled brick powder compared with FA, the 28 d strength of RBFM has varying degrees of decline, when B/S is 1∶5, the dosage is 30%, and the consistency is 70 mm, its 28 d compressive strength decreases by 32.74%, but still is above M5 mortar level, which can meet the demands for the majority of masonry engineering.
    華龍一號”核電站大體積混凝土施工技術
    華龍一號”核電站大體積混凝土施工技術
    • 向 群
    2018年第12期
    摘要
    引用本文
    摘 要:“華龍一號”核電站是我國自主研發的具有完全自主知識產權的第三代核電站,采用的是國際上最先進的單堆布置、雙層安全殼結構。核電站設計中結構混凝土強度高、體積大,許多重要結構都屬于大體積混凝土,因此,大體積混凝土施工質量是核電站土建建造中一個重點。本文介紹了“華龍一號”核電站反應堆廠房筏基大體積混凝土澆筑、振搗的過程控制,以及測溫、應力應變檢測等監控養護措施,可為類似大體積混凝土施工提供參考。 Abstract: "Hualong No. 1" nuclear power station is the third generation nuclear power station with completely independent intellectual property rights, which adopts the most advanced single reactor arrangement and double containment structure in the world. In the design of nuclear power station, structural concrete has high strength and large volume. Many important structures belong to mass concrete. Therefore, the construction quality of mass concrete is a key point in the civil construction of nuclear power station. The process control of pouring and vibrating of mass concrete on raft foundation of reactor building of Hualong No.1 nuclear power station is introduced, the monitoring and curing measures such as temperature measurement, stress and strain detection are introduced too, which can provide reference for similar mass concrete construction.
    疊合梁澆筑方案對梁下支撐安全性的優化研究
    疊合梁澆筑方案對梁下支撐安全性的優化研究
    • 彭 博1,王 東1,徐竟峰2
    2018年第12期
    摘要
    引用本文
    摘 要:實際工程中大截面梁的混凝土澆筑體積較大,梁下支撐的跨距和步距較小,雖然在使用過程中支撐的安全儲備較大,但存在搭設支撐耗時、危險性較大且不經濟等缺點。結合工程實例運用有限元軟件Ansys中單元生死功能對疊合梁的澆筑進行模擬,對使用疊合梁澆筑方式下梁下支撐進行屈曲分析,并對梁下支撐系統進行了安全性和經濟性優化。 Abstract: In actual project, concrete pouring volume of large section beam is large, under beam shoring scaffold span and interval are smaller, while the safety stock to shoring scaffold in use is bigger. When set-up shoring scaffold, there are shortcomings such as time consuming, risky and uneconomical. Combined with practical engineering, th finite element software Ansys is used to simulated with birth and death element in the composite beam casting, the beam buckling analysis is carried out by the use of composite beam under the shoring scaffold of the casting mode, and the safety and economic optimization of beam supporting system is also carried out.
    大型預制柱吊裝技術研究[J].混凝土與水泥制品
    大型預制柱吊裝技術研究[J].混凝土與水泥制品
    • 吳煥娟,黃清杰,蔣勤儉,孫源澤
    2018年第12期
    摘要
    引用本文
    摘 要:大型預制柱的吊裝是裝配式結構施工的關鍵工序,各階段吊裝方式的選擇,吊點位置的確定對施工安全影響很大,本文系統介紹了大型預制柱從生產制作、運輸到安裝全過程的吊裝技術,以期為大型預制柱構件安全吊裝提供技術支撐。 Absrtact: The hoisting of large prefabricated columns is the key process of assembly structure construction. The selection of hoisting modes in each stage and the location of hoisting points have a great impact on construction safety. The hoisting technology of large prefabricated columns from production, transportation to installation are systematically introduced tin order to provide safe hoisting for large prefabricated column components, which can provide technical support.
    混凝土不凝結原因分析及檢測方法[J].混凝土與水泥制品
    混凝土不凝結原因分析及檢測方法[J].混凝土與水泥制品
    • 張海東,王登科,陳宏哲,宋新樂
    2018年第12期
    摘要
    引用本文
    摘 要:為快速分析和判斷混凝土不凝結原因,研究了緩凝劑(葡萄糖酸鈉)的超摻、粉煤灰、礦渣粉完全替代水泥對20 h齡期混凝土溶液pH值的影響以及在緩凝劑超摻情況下采用火焰光度計檢測稀釋液中Na元素濃度變化。結果表明,緩凝劑超摻對混凝土pH值無顯著影響;粉煤灰、礦渣粉完全替代水泥時pH值有顯著差異;混凝土溶液中Na元素火焰光度計法的檢測濃度與緩凝劑超摻倍數成線性正相關,可以通過混凝土溶液Na檢測濃度推測緩凝劑超摻倍數。本論文提出了一種快速判斷混凝土不凝結原因的方法,可供工程各相關方參考。 Abstract: The pH of the solution in concrete at the age of 20 h was studied when cement was completely replaced by fly ash, slag powder and the dosage of retarder(sodium gluconate) was mixed excessively for rapid analysis and judgement of the cause of concrete non condensation. The flame photometer was used to measure the concentration of Na element under the condition of overdoge addition of retarder. The results show that the change of pH in concrete with the excessive dosage of retarder is not obvious. When cement is completely replaced by fly ash and slag powder, pH of the concrete has significant difference. The concentrion of Na element measured by flame photometer has a linear positive correlation with the super multiplier of retarder and the super multiplier of retarder can be deduced from the concentration of Na element. A fast method to determine the cause of concrete not condensing is put forward for reference by relevant parties in the project.
    B02級砂加氣混凝土保溫板生產及其應用試驗研究[J].混凝土與水泥制品
    B02級砂加氣混凝土保溫板生產及其應用試驗研究[J].混凝土與水泥制品
    • 劉 洋,李軍奇,薛小雨
    2018年第12期
    摘要
    引用本文
    摘 要:研發了B02級砂加氣混凝土保溫板,對產品的原材料、配合比、生產工藝參數、產品性能和耐候性能進行了試驗研究。 Abstract: The preparation technology of B02 grade sand aerated concrete insulation board is developed. The raw materials, mix ratio, production process parameters, product properties and weatherability of the insulation board are tested.
    輕質混凝土多孔磚自保溫墻體熱橋傳熱分析
    輕質混凝土多孔磚自保溫墻體熱橋傳熱分析
    • 吳 鋒,曹 帆,俞方英
    2018年第12期
    摘要
    引用本文
    摘 要: 運用計算流體力學(CFD)軟件對輕質混凝土多孔磚自保溫墻體在框架結構體系中典型的外墻轉角熱橋傳熱性能進行了數值模擬計算,通過溫度場結果分析,外墻轉角熱橋內表面在杭州冬季空調室外計算條件下會發生結露現象。為防止熱橋內表面結露現象的發生,提出了外墻轉角熱橋部位的保溫處理措施,這些措施值得在自保溫墻體體系中借鑒。 Abstract: The heat transfer performance of the external corner thermal bridge about the lightweight concrete porous brick self-insulation wall system in frame structure system is numerically simulated by using computational fluid dynamics (CFD) software. According to the results of temperature, the condensation will occur in the inner surface of the exterior wall corner thermal bridge under the outdoor condition of winter air conditioning in Hangzhou, and some insulation measures are put forward in order to prevent the occurrence of surface condensation. These measures can be used for reference in self-insulation wall system.
    HRB500鋼筋輕骨料混凝土軸心受壓構件試驗研究[J].混凝土與水泥制品
    HRB500鋼筋輕骨料混凝土軸心受壓構件試驗研究[J].混凝土與水泥制品
    • 張程遠1,2,邵永健1,2,朱愛萍3,勞裕華1,2,肖志敏1,2
    2018年第12期
    摘要
    引用本文
    摘 要:通過8根輕骨料混凝土軸心受壓構件試驗研究,獲得了配置HRB500鋼筋輕骨料混凝土軸心受壓構件的受力性能與破壞形態,以及荷載-應變關系曲線等試驗結果。分析了HRB500鋼筋與輕骨料混凝土的協同工作性能,并且提出了軸心受壓構件的設計計算方法。研究結果表明,提高輕骨料混凝土強度、配筋率、配箍率能夠提高輕骨料混凝土的峰值壓應變和構件的極限承載力,HRB500鋼筋在輕骨料混凝土軸心受壓構件中工作性能良好,強度得到充分發揮。 Abstract: Based on the experiment research about 8 lightweight aggregate concrete(LWAC) columns.The mechanical properties, failure mode and stress-strain curve of HRB500 steel bar LWAC axially compressed column wereobtained. The results show that improve the strength of LWAC, reinforcement ratio, stirrup ratio can improve the peak strain of LWAC and the ultimate bearing capacity of columns, HRB500 steel bar work well in LWAC columns and makes full use of its strength.
    .陶粒PF混凝土性能試驗研究[J].混凝土與水泥制品
    .陶粒PF混凝土性能試驗研究[J].混凝土與水泥制品
    • 周 乾1 ,李寶寶1,吳發紅1,荀 勇1,嵇蔚冰2,陳云德2,張亞仿3
    2018年第12期
    摘要
    引用本文
    摘 要:為探索與結構混凝土同壽命的保溫模板的主要性能,以陶粒和PF(酚醛樹脂)顆粒為骨料,水泥為膠結材料,以水泥用量為變化參數,分別制作了4組用以測定導熱系數和吸水率、抗壓強度的混凝土試件。試驗結果表明,導熱系數和吸水率隨水泥用量增加而降低,抗壓強度隨水泥用量增加而增加,當水泥用量達到200 kg/m3時,導熱系數及抗壓強度均達到JG/T 283—2010《膨脹?;⒅檩p質砂漿》的要求,當水泥用量達到250 kg/m3時,吸水率僅為5.2%,導熱系數亦符合JG/T 283—2010的規定,但其抗壓強度遠高于其要求。該成果可為保溫模板設計提供依據,也可為外墻保溫層材料選用提供新途徑。 Abstract: The same life performance as the main structural concrete exploration and incubated template to ceramic and PF (phenol resin) particles aggregate, cement cementing material in an amount of variation parameter, the 4 groups were prepared for the determination of concrete specimens with thermal conductivity, water absorption and compressive strength. The results show that the thermal conductivity and water absorption decrease with the increase of cement dosage, but the compressive strength increases with the increase of cement dosage. When the cement dosage is 200 kg/m3, the thermal conductivity and compressive strength reach the requirements of JG/T 283—2010 Expanded Vitrified Microbeads Lightweight Mortar, when the cement dosage is 250 kg/m3, the water absorption rate is only 5.2%, the thermal conductivity is also in line with JG/T 283—2010, but its compressive strength is far higher than its requirements. The result can provide a basis for the design of the thermal insulation template, and can also provide a new way for the selection of the outer wall insulation material.
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