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    蘇州混凝土水泥制品研究院有限公司

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    第九期

    高嶺石型硫鐵礦選礦尾礦作水泥活性混合材研究
    高嶺石型硫鐵礦選礦尾礦作水泥活性混合材研究
    • 宋安康,宋雪梅,郭 錚,宋 強,姚 洪,岳川淞,馮啟明,黃 陽
    2015年第9期
    摘要
    引用本文
    摘 要:針對高嶺石型硫鐵礦選礦尾礦的成分特點,對其用作水泥活性混合材的火山灰活性進行了研究。結果表明,該尾礦經適當溫度的煅燒,再粉磨到一定粒度后具有很高的火山灰活性,其活性指數高達120%,是良好的水泥活性混合材和高性能混凝土活性摻合料,其優點主要是生產工藝簡單,能耗低、不產生二次污染。 Abstract: Aming the characteristics of kaolinite type pyrite cinder, the research on pozzolanic activity of cement active admixture is carried out.The results show that, tailing is calcined in appropriate temperature then is ground to a certain fineness with high pozzolanic activity, its activity index is up to 120%, the tailing can be used as fine cement active admixture and admixture for high-performance concrete. The advantages are included in simple production process, low energy consumption and high consumption of the tailing without secondary pollution.
    纖維-橡膠混凝土力學性能試驗研究
    纖維-橡膠混凝土力學性能試驗研究
    • 別思汗1,張 龍2,王利剛3,吳 璽3
    2015年第9期
    摘要
    引用本文
    摘 要:用橡膠粉以20%的比例等體積替換C40混凝土中的砂,制成橡膠混凝土,并添加不同種類的纖維對其進行改性。試驗表明,橡膠粉與水泥結合狀況較好,橡膠混凝土具有低自重、低彈模,較好的延性及抗裂性能等優點,但強度及流動性降低明顯。纖維的摻入能提高橡膠混凝土的強度,同時不降低其延性及抗裂性能。纖維對橡膠混凝土抗折強度的改善效果優于抗壓強度及劈裂抗拉強度。鋼纖維是改善效果最明顯的單摻纖維,塑鋼纖維與水泥缺乏足夠的黏結力而改善效果不佳。纖維混雜后,在一定范圍的摻量呈現正效應。 Abstract: Rubber concrete(RC) is prepared by replace 20% sand of C40 concrete by rubber powder in an equal volume which is adding different kinds of fiber materials to modify the properties of RC. The results show that rubber powder can be well combined with cement, RC has advantage of low self-esteem, low elastic modulus, good ductility and crack resistance, but strength and mobility are reduced significantly. The strength of RC is improved by adding fiber meanwhile, ductility and crack resistance are not reduced. Improvement effects of fiber on flexural strength is better than splitting tensile and compressive strength. Steel fiber is better than any other fiber in improvement effect. Plastic fiber is poor in modifying properties because of its bad combination with cement. Mixing fibers have positive effects in a certain range.
    廢舊橡膠粉改性混凝土滲透性能試驗研究
    廢舊橡膠粉改性混凝土滲透性能試驗研究
    • 田艷鳳1,2,李贊成2,高艷青2
    2015年第9期
    摘要
    引用本文
    摘 要:以C30混凝土為基準,選用16目、20目、40 目三種粒徑廢舊輪胎橡膠粉等體積取代粗細骨料制備橡膠混凝土,研究膠粉粒徑、摻量對橡膠混凝土28d后的平均滲水高度、相對滲水系數的影響。結果表明,摻入橡膠粉后,混凝土拌合物流動性減弱,孔隙率減??;16目膠粉混凝土的滲水高度和相對滲透系數隨膠粉摻量呈現先低再高再低的變化,20目、40目膠粉橡膠混凝土波動變化??;膠粉摻量小于125L時,三種膠粉制備的混凝土,相對滲透系數均小于基準混凝土,到125L時,相對滲透系數趨于一致;綜合橡膠混凝土28d抗壓強度和抗滲性能表現,橡膠粉的摻量宜控制在100L以內,最佳粒徑為20目和40目。 Abstract: Using C30 concrete as a standard, rubber concrete is prepared by waste scrap rubber powder with three particle size of 16 mesh, 20 mesh and 40 mesh scrapped which is replaced in same volume. The influence of powder particle size and dosage on average water penetration height and relative permeability coefficients for rubber concrete after 28 days later is investigated. The results show that, the fluent of fresh concrete decreases and porosity reduces by adding rubber powder; by adding dosage of powder, water penetration height of concrete with 16 mesh powder and relative permeability coefficients decrease first then increase at last decrease, while 20 mesh and 40 mesh varies between a small range; when dosage of powder is less than 125 liter, relative permeability coefficient of rubber concrete mixed with three kinds of powder is less than reference concrete. Relative permeability coefficient of rubber concrete comes consistent up to 125 liter dosage. Compressive strength and permeability of rubber concrete in 28 day are synthesized, the content of rubber powder is controlled by 100 liter, best diameter is 20 mesh and 40 mesh.
    超厚大體積重混凝土施工質量控制
    超厚大體積重混凝土施工質量控制
    • 馬奉公1,張進濤2
    2015年第9期
    摘要
    引用本文
    摘 要:以某實際工程為例,介紹了超厚大體積重混凝土配制過程及施工質量控制要點,可為類似工程提供參考與借鑒。 Abstract: For an actual engineering as a example,the preparation process of super thickness mass concrete and quality control points of construction are introduced, that can provide reference for such engineering.
    裝配式混凝土框架結構預制安裝技術
    裝配式混凝土框架結構預制安裝技術
    • 王 剛
    2015年第9期
    摘要
    引用本文
    摘 要:結合福建省首個全裝配式鋼筋混凝土框架結構建筑,介紹了裝配式混凝土框架結構預制構件的生產及安裝施工過程中的關鍵工藝和技術要點。項目自身結構復雜,構件拆分種類繁多,預制率高,實施過程中在工藝工法方面做了一些改進創新。相對于傳統施工,裝配式施工技術具有施工速度快、產品質量高、施工現場整潔等優點,符合綠色建筑施工要求。 Abstract: Based on the pilot project of Fujian province's first full prefabricated reinforced concrete frame structure building, this paper detailed introduce the key crafts and main technical points of assembled monolithic concrete frame structure in the process of production and installation. Due to the complicated structurewide variety of protocol component split and high prefabrication ratio, this project had done lots of innovative work in the improvement of crafts and methods.The monolithic precast concrete construction has an advantage in construction speed, high product quality and clean site over traditional construction,satisfied with green building construction requirements.
    預拌砂漿保水性相關問題探討
    預拌砂漿保水性相關問題探討
    • 王忠平1,韓玉春2,韋銀華2,夏如茜2
    2015年第9期
    摘要
    引用本文
    摘 要:分析了現有砂漿標準中的兩種砂漿保水性測試方法,對比了不同砂漿保水增稠材料的測試結果及高保水性特種砂漿的測試結果。結果表明,同樣材料下試模濾紙法測試結果偏高,容易達到標準要求,而用真空抽濾法均達不到低保水標準要求。砌筑與抹灰砂漿用真空抽濾法和試模濾紙法測試的砂漿保水率存在明顯的差異。而真空抽濾法能有效區分特種砂漿保水性能上的差異。建議預拌砂漿根據不同保水率分級,以便用戶可根據基墻吸水的不同選用不同保水性能的砂漿。 Abstract: Two kinds of test method for water retention of mortar are analyzed in existing standards, test results of different water retention and thickending materials of mortar and high water retention of special mortar are compared. The results show that the test results increase with tryout filter paper method under the same materals and tryout filter paper method can meet standard requirments easily, however, vaccum take-off method can meet standard requirments hardly. There are significant differences of mortar retentivity for masonry mortar and mortar for plaster and between vaccum take-off method and tryout filter paper method. Vaccum take-off method can effectively distinguish the differences of water retention properties for special mortar. According to different water retention rate, the grade of ready-mixed mortar is proposed. Based on different absorption of wall, the users can choose different water retention of mortar.
    稻草纖維復合水泥制備墻體保溫材料的研究
    稻草纖維復合水泥制備墻體保溫材料的研究
    • 王曉燕1,呂朝霞1,闞欣榮2
    2015年第9期
    摘要
    引用本文
    摘 要:將稻草纖維與水泥復合制作墻體保溫材料,研究了稻草纖維浸提物、稻草纖維長度、摻量對復合材料性能的影響。試驗結果表明,稻草纖維在水中或堿性溶液中浸泡會溶解出浸提物,這些浸提物對水泥的初凝緩凝效果明顯,對終凝緩凝作用較??;稻草纖維長度在4~12mm變化時,長度越小,復合材料強度越高,導熱系數越小,干密度也較??;稻草纖維摻量從3%增加到5%,摻量越多,復合材料導熱系數越小,干密度越低,但強度降低。復合墻體保溫材料的干密度與吸水率成反比。 Abstract: The insulation wall materials are prepared for straw fiber and cement, the influence of straw fiber extracts, straw fiber length and dosage on properties of composite materials is studied.The results show that straw can dissolve extracts in water or alkalin solutions, retarding effects for initial setting time of extracts on cement is obvious, extracts have less retarding effects for final setting time. The variation of straw fiber length is 4~12mm, the less length,the higher strength of composite materials, the smaller thermal conductivity, the lower dry density; the dosage of straw fiber increases from 3% to 5%, the more dosage, the smaller thermal conductivity of composite materials, the lower dry density, however, the strength is decreased. The dry density of composite insulation wall materials is inversely proportional to water absorption.
    消泡劑對新拌砂漿性能的影響研究
    消泡劑對新拌砂漿性能的影響研究
    • 王 寧,張凱峰,趙世冉,姚 源,鄧天明
    2015年第9期
    摘要
    引用本文
    摘 要:在聚羧酸系高效減水劑中復配消泡劑,探討了消泡劑摻量對砂漿性能的影響。結果表明:當基準砂漿加入消泡劑時,基準砂漿的含氣量大幅度降低;砂漿處于高流動度狀態時,增加消泡劑摻量,砂漿的流動度逐漸增大、含氣量逐漸降低且最終趨于穩定、黏度逐漸降低、屈服應力呈現先減后增的趨勢,當消泡劑摻量為0.5g時,屈服應力達到最??;固定配比時,增加水膠比,砂漿含氣量呈現升高的趨勢。 Abstract: Effects of defoamer dosage on properties of mortars were investigated by adding defoamers into the polycarboxylate superplasticizer. The experimental results show that: when adding defoamer in the reference mortar, the air content of the mortar could decrease sharply; when the mortar is in a high state of fluidity, with the increase of defoamer dosage, the fluidity of mortar increases gradually, the air content of mortar reduces gradually and eventually tends to stabilize, the viscosity of mortars could reduce gradually, and the yield stress of mortar presents a trend of decreasing at first and then raising, when the defoamer dosage is 0.5g, the yield stress of mortar reaches a minimum value; when the W/B increases, the air content of mortar tends to increase at a fixed mix proportion.
    鋼筋超高韌性水泥基復合材料梁正截面破壞的仿真分析
    鋼筋超高韌性水泥基復合材料梁正截面破壞的仿真分析
    • 高淑玲1,2,吳耀泉1
    2015年第9期
    摘要
    引用本文
    摘 要:超高韌性水泥基復合材料(Engineered Cementitious Composites,簡稱ECC)具有較高的拉伸應變和抵抗開裂的能力,用其取代混凝土可以提高結構的延性和抗裂性能?;贏NSYS平臺數值模擬了鋼筋超高韌性水泥基復合材料梁和鋼筋混凝土梁的正截面破壞過程,比較了兩者模擬結果,研究了鋼筋超高韌性水泥基復合材料梁的彎曲性能。結果表明,鋼筋超高韌性水泥基復合材料梁的正截面破壞過程與鋼筋混凝土梁相似,承載力和抵抗開裂的能力有所提高。 Abstract: Engineered cementitious composites(ECC) has high tensile strain capacity and crack resistance performance, ductility of structure and crack resisting ability are improved by ECC replaced concrete. Based on ANSYS platform, numerical simulation results for failure processes of normal section which are between reinforced engineered cementitious composites beam and reinforced concrete beam are compared, the flexural behaviors of reinforced engineered cementitious composites beam are studied. The results show that beam failure process of reinforced engineered cementitious composites beam are similar with reinforced concrete beam, bearing capacity and ductility of reinforced engineered cementitious composites beam are better than reinforced concrete beam.
    不同種類纖維混凝土薄板抗沖擊性能試驗研究
    不同種類纖維混凝土薄板抗沖擊性能試驗研究
    • 王曉光1,周 乾2,張亞仿3,荀 勇2 ,吳發紅2
    2015年第9期
    摘要
    引用本文
    摘 要:為了研究高韌性肋形混凝土永久模板性能,制作了同規格的分別摻加四種不同纖維及無纖維混凝土薄板,用于模擬高韌性肋形混凝土模板實際支承條件的抗沖擊試驗。試驗結果表明,摻加纖維的混凝土薄板比無纖維混凝土薄板抗沖擊性能有明顯提高,能夠滿足永久性模板在運輸和施工過程中可能承受的沖擊力影響。 Abstract: In order to study the performance of high toughness ribbed concrete permanent template, four different types of concrete sheets with fibers and non-fiber in this test make the same size specimens which are used for simulating anti-impact test of high toughness ribbed concrete permanent template in practical support conditions.The results show that anti-impact properties of concrete sheets adding fiber is better than concrete sheets with non-fiber. High toughness ribbed concrete permanent template is satisfied by impact influence that may suffer in transport and construction process.
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