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    蘇州混凝土水泥制品研究院有限公司

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    第七期

    石灰石粉對水泥混凝土性能影響的研究進展
    石灰石粉對水泥混凝土性能影響的研究進展
    • 肖 佳,許彩云
    2012年第7期
    摘要
    引用本文
    摘 要:從石灰石粉對C3S、C3A和水泥混凝土水化影響方面入手,闡述了水泥-石灰石粉膠凝體系的水化特性,并在此基礎上,進一步從石灰石粉對水泥基材料流變性、強度、尺寸穩定性、耐久性的影響等方面,綜述了水泥-石灰石粉膠凝材料的國內外研究現狀。針對現有水泥-石灰石粉基材料研究存在的問題,探討了全面、系統研究水泥-石灰石粉膠凝體系的重要性。 Abstract: The hydration characteristic of cement-limestone power cementitious system is described based on the effect of limestone power on the hydration of C3S, C3A and cement concrete. On the basis of above all, the research status at home and abroad of the cement-limestone power cementitious material is summarized from the influences of limestone power on the rheology, strength, dimensional stability and durability of cement-based materials. Aiming at the problems of the present limestone powder cement-based material research, the importance of completely and systematically studying the cement-limestone power cementitious system is discussed.
    商品混凝土行業低碳化發展的十個途徑
    商品混凝土行業低碳化發展的十個途徑
    • 崔源聲,李 輝,徐德龍
    2012年第7期
    摘要
    引用本文
    摘 要:在全球面臨能源日益枯竭、環境嚴重污染、氣候不斷惡化的今天,全社會各行各業都應發展低碳經濟。商品混凝土行業向低碳化發展亦是大勢所趨。通過調研,提出了商品混凝土行業低碳化發展的十個具體途徑。 Abstract: Nowadays, the problems such as energy exhaustion, environment pollution and ?climatic deterioration, the low carbon economy should be developed in all the industries. And the ready-mixed concrete industry should also be developed into the low carbon industry. Through the investigation, the ten measures for the ready-mixed concrete industry developed into the low carbon industry are proposed.
    鋼纖維混凝土在西安地鐵工程中的應用
    鋼纖維混凝土在西安地鐵工程中的應用
    • 孫文進
    2012年第7期
    摘要
    引用本文
    摘 要:以西安地鐵主體結構工程施工為例,介紹了鋼纖維混凝土在該工程地裂縫段及車站主體結構中應用的施工要點及質量控制措施。 Abstract: Taking the construction of Xi’an Metro main structure project as an example, the construction points and quality control measures of the ground cracks and station main structure are introduced which are applied by steel fiber reinforced concrete.
    排水管鋼筋骨架滾焊機的選型與使用
    排水管鋼筋骨架滾焊機的選型與使用
    • 趙瑞軍
    2012年第7期
    摘要
    引用本文
    摘 要:探討了排水管鋼筋骨架滾焊機生產范圍劃分的合理性,從理論上分析了合理調節焊接參數在滾焊機使用過程中的重要性,列舉了滾焊機常見故障的排除方法和節能降耗的具體措施,探討了造成鋼筋骨架不合格的原因,并提出了相應的解決方案。 Abstract: How to rationally divide the production scope of reinforced skeleton frame roll welders for drainage pipes is discussed. The importance of reasonably adjusting the welding parameters in the process of using roll welders is theoretically analyzed. Meanwhile, the solving methods of common stoppages of roll welders and measures of energy saving are listed. In addition, the reasons why reinforced skeleton frames are unqualified are discussed, and relevant solving ways are put forward.
    預應力混凝土結構抗火性能研究綜述
    預應力混凝土結構抗火性能研究綜述
    • 薛蘇泉
    2012年第7期
    摘要
    引用本文
    摘 要:通過大量文獻資料的研究與對比分析,對預應力混凝土結構火災的研究現狀進行了綜述,包括高溫(火災)條件下預應力鋼筋和預應力混凝土結構退化規律試驗研究現狀、溫度場的計算、構件承載力計算以及防火和災后處理等,展望了今后的研究方向。 Abstract: Based on the comparative and analytical investigation on large number of research references, the research summarization on fire-resistant performance of the prestressed concrete structures is carried out, which includes the study status of the deterioration law of prestressed reinforcement and prestressed concrete structure at high temperature condition, the calculation of the temperature field, the calculation of loading capacity of structure members, fire prevention and the treatment of post-disaster, etc. And the future research directions are prospected.
    再生粗骨料混凝土梁正截面受彎性能研究
    再生粗骨料混凝土梁正截面受彎性能研究
    • 馬 靜1,王振波2,趙才全3
    2012年第7期
    摘要
    引用本文
    摘 要:參照普通混凝土配合比設計方法配制再生粗骨料混凝土,采用相同尺寸和配筋率制作了6根再生混凝土簡支梁和2根普通混凝土簡支梁,進行靜力加載試驗。結果再生粗骨料取代率為30%時,再生混凝土梁的極限彎矩最大。用普通混凝土公式計算再生混凝土梁的開裂彎矩時,當再生粗骨料取代率大于50%時,建議修正系數取0.7;用普通混凝土公式計算再生混凝土梁正截面的極限承載力時,計算結果與試驗結果符合較好。 Abstract: Recycled coarse aggregate concrete is prepared based on the mix ratio design method of normal concrete. And 6 recycled aggregate concrete beams and 2 natural aggregate concrete beams with the same section size and same percentage of reinforcement are prepared, and the static loading test is carried out. The results show that the ultimate bending moment of recycled aggregate concrete beams is the largest when the replacement ratio of recycled coarse aggregates is 30%. The correction coefficient is suggested to take 0.7 when the replacement ratio of recycled coarse aggregates is more than 50% and when the cracking moment of recycled aggregate concrete beams is calculated by ordinary concrete formula. It is still feasible to calculate the ultimate loading capacity of normal section of recycled aggregate concrete beams with ordinary concrete formula.
    脫硫建筑石膏改性及養護制度的研究
    脫硫建筑石膏改性及養護制度的研究
    • 周 飛1,楊久俊1,2,王 芳3
    2012年第7期
    摘要
    引用本文
    摘 要:利用燃煤電廠煙氣脫硫所產的脫硫石膏制備的β型脫硫建筑石膏,在組分復合改性提高強度和耐水性的基礎上,探討了不同養護制度對脫硫建筑石膏復合改性砌塊抗壓強度的影響。結果表明:當β型脫硫建筑石膏、生石灰、水泥、粉煤灰在58%:14%:12%:16%的配合比下,可以使復合改性脫硫石膏基膠凝材料的抗壓強度和軟化系數明顯提高,分別達到18.7MPa和 0.7;在濕熱養護條件下,養護溫度為75℃、養護濕度為95、養護時間為12h的條件下,脫硫石膏復合改性砌塊性能表現良好,14d抗壓強度達到19.8MPa,可以基本滿足建筑墻體材料的要求。 Abstract: Using the β-desulfurization building gypsum prepared from calcined gypsum from flue gas desulfurization (FGD), based on the components compound modification to improve the strength and water resistance of blocks, the influences of the different maintenance systems on the compressive strength of the desulfurization building gypsum compound modification blocks are investigated. The results show that the compressive strength and softening coefficient of the cementitious material with compound modification calcined gypsum from FGD have greatly improved by mixing with fly ash, lime, and cement. When the mix ratio ofβ-desulfurization building gypsum, lime, cement, fly ash is 58%: 14%: 12%: 16%, the compressive strength and softening coefficient can reach to 18.7MPa and 0.7 respectively. In the hot and humid maintenance condition, with the maintenance temperature 75℃, humidity 95 and maintenance time 12 h, the performance of the desulfurization gypsum compound modification blocks is good, and the 14d compressive strength gets to 19.8MPa, which can basically meet the requirement of building wall materials.
    碳纖維-石墨復合水泥基材料導電性能的試驗研究
    碳纖維-石墨復合水泥基材料導電性能的試驗研究
    • 孫建虎1,石少卿1,劉穎芳1,張同周2,劉盈豐3,陳取鋒2
    2012年第7期
    摘要
    引用本文
    摘 要:在石墨水泥基材料中摻入低電阻率且具有阻裂功能的短切碳纖維可以提高材料的導電性能。試驗研究了環境溫度、碳纖維長度及組合長度碳纖維等對石墨水泥基材料電阻率的影響。結果表明,碳纖維可以改善石墨水泥基材料的性能,組合長度碳纖維的摻入有利于材料導電網絡的形成。 Abstract: Mixed graphite cement-based materials with short-cut carbon fiber with low resistivity and crack resistance function can improve the conductive performance of materials. The effects of the ambient temperature, fiber length and composite length of carbon fiber on material resistivity are studied through tests. The results show that the carbon fiber can improve the performances of graphite cement-based materials and the composite length of carbon fiber is beneficial to the formation of conductive network of materials.
    路用橡膠粉-聚丙烯纖維混凝土力學性能研究
    路用橡膠粉-聚丙烯纖維混凝土力學性能研究
    • 王 勃1,譚亞云2,李宏波2,3,鄒媛媛2
    2012年第7期
    摘要
    引用本文
    摘 要:為了研究橡膠粉和纖維不同摻量協同作用對路用混凝土的抗折強度和延性等力學性能的影響,進行了22組試驗,分別對基準混凝土、橡膠粉混凝土和橡膠粉纖維混凝土進行了抗壓強度、抗折強度和劈裂強度試驗。試驗結果表明,橡膠粉-纖維可改善路用混凝土的韌性,對于60目橡膠粉+10mm纖維混凝土,橡膠粉摻量控制在6%以內,纖維摻量控制在0.5%以內為佳;對于60目橡膠粉+20mm纖維混凝土,橡膠摻量控制在2%以內,纖維摻量控制在0.5%以內為佳。 Abstract: In order to investigate the influences of the synergistic reaction between fiber and rubber powder on flexural strength and extension of concrete used in subgrade, 22 groups test are conducted, which include compressive strength, flexural strength and splitting strength of standard concrete, rubber concrete and fiber-rubber concrete. The results show that in order to improve the toughness of fiber-rubber concrete, for 60 mesh rubber powder+10mm fiber concrete, the content of rubber should be controlled by less than 6%, and the content of fiber should be controlled by less than 0.5%; and for 60 mesh rubber powder+20mm fiber concrete, the appropriate content of rubber is less than 2% and the content of fiber is less than 0.5%.
    高強鋼筋聚丙烯纖維混凝土梁受彎性能試驗研究
    高強鋼筋聚丙烯纖維混凝土梁受彎性能試驗研究
    • 戎 賢,張健新,李艷艷
    2012年第7期
    摘要
    引用本文
    摘 要:為研究高強鋼筋聚丙烯纖維混凝土梁在集中荷載作用下的受彎性能,對6根摻量不同的聚丙烯纖維矩形截面梁進行了試驗研究,對比分析了高強鋼筋聚丙烯纖維混凝土梁的受彎承載力、正常使用階段的裂縫寬度及變形。結果表明,高強鋼筋聚丙烯纖維混凝土梁受力性能和普通鋼筋混凝土梁相同;高強鋼筋聚丙烯纖維混凝土梁的受彎承載力、撓度及裂縫寬度均可以按照現行GB 50010—2010《混凝土結構設計規范》中相關公式計算。 Abstract: In order to investigate the bending behavior of polypropylene fiber concrete beam with high strength steel bars, 6 rectangular section beams with different dosages of polypropylene fiber are tested. The bending capacity, crack width and deformation of polypropylene fiber concrete beams reinforced with high strength steel bar are analyzed. The results show that the mechanical property of polypropylene fiber concrete beams reinforced with high strength steel bar is the same as the common reinforced concrete beams. The bending capacity, deflection and crack width of polypropylene fiber concrete beams reinforced with high strength steel bar can still be calculated according to GB50010-2010 .
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