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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

    鐵尾礦顆粒形貌對砂漿尺寸穩定性影響的研究
    鐵尾礦顆粒形貌對砂漿尺寸穩定性影響的研究
    • 李曉光,陳 婷,盧 攀
    2016年第9期
    摘要
    引用本文
    摘 要:為研究鐵尾礦顆粒形貌對砂漿尺寸穩定性的影響,利用光學顯微鏡觀察了鐵尾礦砂、天然河砂和普通機制砂的顆粒形貌并對其進行了定量描述,探索量化指標對砂漿尺寸穩定性的影響規律。試驗結果表明,三種細骨料中,鐵尾礦砂的針片狀、非球形程度最高,其顆粒表面光滑但存在最多的尖銳棱角。在干燥環境下,細骨料較低的OR值和RK值將顯著增加砂漿試件的收縮值。由于鐵尾礦砂這兩個指標最低,其砂漿試件的尺寸穩定性低于天然河砂和普通機制砂砂漿試件。不同粒級的鐵尾礦砂所配制的砂漿試件尺寸穩定性試驗證明,此時影響砂漿尺寸穩定性主要因素不是顆粒形貌,而是粒級范圍,粒級范圍越小,則鐵尾礦砂漿試件的尺寸收縮越大。 Abstract: The influence of particle morphology for iron ore tailing on dimension stability of mortar was studied, particle morphology for iron tailings sand(IOT), nature river sand(NS) and manufactured sand(MS) was observed by optical microscope, influence rules of quantitative description and indicators on stability of mortar dimension is carried out. The results show that, The results show that IOT sand is flakiness, has greater degree of irregular shape and smoother surface, which exists the most sharper edges and corners in three kinds of fine aggregates. Under dry environment, lower OR value and RK value for fine aggregates will be increased obviously through shrinkage value. Dimension stability of mortar specimens is lower than that of NS specimens and MS specimens, because of lowest OR value and RK value. Experiment of dimension stability for mortar specimens is proved by prepared IOT with different grain size, the main effecting factors of dimension stability of mortar is grain rang, not particle morphology, demensional shrinkage of IOT mortar specimens becomes greater with smaller grain range.
    鋼鐵渣粉在蒸養混凝土中的應用
    鋼鐵渣粉在蒸養混凝土中的應用
    • 孫建偉,陳忠輝
    2016年第9期
    摘要
    引用本文
    摘 要:在水膠比相同的條件下,制備了純水泥混凝土、分別摻加30%和40%鋼鐵渣粉A(礦渣∶鋼渣=7∶3)的混凝土、分別摻加30%和40%鋼鐵渣粉B(礦渣∶鋼渣=6∶4)的混凝土,并經蒸汽養護后,測定了不同蒸養混凝土的抗壓強度、抗氯離子滲透性、抗碳化性和抗硫酸鹽侵蝕性。結果表明,摻加鋼鐵渣粉能提高混凝土后期的抗壓強度;摻加鋼鐵渣粉A的混凝土的抗壓強度高于摻加鋼鐵渣粉B的混凝土的抗壓強度;摻加鋼鐵渣粉能提高混凝土28d的抗氯離子滲透性,其中摻加40%鋼鐵渣粉A能明顯提高混凝土90d的抗氯離子滲透性;摻加鋼鐵渣粉對混凝土的抗碳化性能影響很??;摻加鋼鐵渣粉能明顯提高混凝土的抗硫酸鹽侵蝕性。 Abstract: The pure cement concrete is prepared by 30% and 40% ground iron and steel slag A (GGBS: steel slag ratio is 7:3), and concretes with 30% and 40% ground iron and steel slag B (GGBS∶steel slag ratio is 6∶4) under the same water-to-binder ratio, the compressive strength, resistance to chloride ion penetration, anti-carbonation and anti-sulfate attack properties of steam-cured concretes were determined. The results show that, adding ground iron and steel slag can improve the late-age compressive strength of concrete, the compressive strength of concrete with ground iron and steel slag A is higher than that of the concrete with ground iron and steel slag B. The resistance to chloride ion penetration of concrete is improved by adding ground iron and steel slag at the age of 28 days. The resistance to chloride ion penetration of concrete is improved by adding 40% ground iron and steel slag A at the age of 90 days. The addition of ground iron and steel slag has little effects on the anti-carbonation properties of concretes, which can improve the anti-sulfate attack property of concrete with ground iron and steel slag.
    摻鋼渣粉尾礦高性能混凝土的制備
    摻鋼渣粉尾礦高性能混凝土的制備
    • 崔孝煒,狄燕清,徐朝陽
    2016年第9期
    摘要
    引用本文
    摘 要:研究了鋼渣粉摻量和養護方式對全固廢混凝土抗壓強度的影響,并通過SEM分析了摻鋼渣膠凝材料水化產物微觀形貌。研究結果表明,鋼渣粉摻量對混凝土的抗壓強度有較大影響,濕熱養護能夠有效激發鋼渣的活性,提高膠凝材料早期強度。摻入20%鋼渣粉,采用56℃濕熱養護,可以制備出28d抗壓強度達77.26MPa的混凝土。摻入鋼渣粉對水化產物種類不會造成影響,在反應的中后期,體系中C-S-H凝膠和鈣礬石的協同生成能夠促進體系強度的增長。 Abstract: The effect of steel slag powder proportion and curing process on compressive strength of solid waste concrete was investigated. The microstructure of hydration products was analyzed by SEM. The results showed that, steel slag content has great influence on the compressive strength of concrete. Steam curing can effectively stimulate the activity of steel slag and improve the early strength of gelling material. Mixed with 20% steel slag, curing at 56℃, the compressive strength of the concrete can achieve 77.26MPa at 28d. The addition of steel slag power has no effect on the type of hydration, the coordinated growth of the ettringite and C-S-H gel is significant for the strength of system in the middle and late stage of the reaction.
    C70高強混凝土足尺構件早期性能監測
    C70高強混凝土足尺構件早期性能監測
    • 朱春銀1,趙 峰1,武建好1,李佳佳1,姚 婷2
    2016年第9期
    摘要
    引用本文
    摘 要:根據某高層建筑塔樓勁性柱實際尺寸,模擬澆筑兩組C70高強高性能鋼筋混凝土足尺柱,以檢驗混凝土配合比、工作性能及強度等參數是否滿足實際施工要求;同時通過預埋傳感器的方法對模擬混凝土柱進行了溫度和變形的實時監測,為進一步研究C70高強混凝土在實際工程條件下的熱學性能和變形性能提供技術依據。 Abstract: Based on actual sizes of soft type rigid column for a high-rise building tower, full-scale column for two groups of C70 high strength high proformance reinforced concrete is poured in order to test whether its working performance, mix proportion and strength can meet the requirements of constructions in the project. Meanwhile, real-time minitoring of concrete column for temperature and deformation is carried out by embedded sensors, which can obtain technical basis for the further study on thermal properties and mechanical properties of C70 high strength concrete in practical engineering conditions.
    立式徑向擠壓制管機的發展現狀與前景
    立式徑向擠壓制管機的發展現狀與前景
    • 吳 宇1,2,馮 勇1,2,張 杰1,2 ,楊征宇1,2,賈丙輝1,2
    2016年第9期
    摘要
    引用本文
    摘 要:分析了典型立式徑向擠壓成型裝備的結構及其成型工藝原理,介紹了當前國產立式徑向擠壓裝備成形混凝土管的常見缺陷及主要成因,指出了立式徑向擠壓制管機研發中的關鍵問題并探討了其解決方法,最后展望了立式徑向擠壓制管機的發展方向。 Abstract:Vertical radial pipe extrusion process is the production of small diameter concrete and reinforced concrete pipes of the latest technology methods. The typical vertical radial extrusion equipment structure and forming process principles are analyzed. And the common defects and the main causes of concrete pipes produced using current domestic vertical radial extrusion molding equipment are introduced. In addition, the key issues of vertical radial pipe extrusion machine and their solutions are put forward. Finally, the development trend of the vertical radial pipe extrusion is prospected.
    摻商洛釩尾礦制備免燒磚的摻商洛釩尾礦制備免燒磚的工藝研究工藝研究
    摻商洛釩尾礦制備免燒磚的摻商洛釩尾礦制備免燒磚的工藝研究工藝研究
    • 李燕怡,王之宇,常亮亮
    2016年第9期
    摘要
    引用本文
    摘 要:通過不同原料配比制備了釩尾礦免燒磚,并對其進行了相關的力學性能測試。研究結果表明,當粗細尾礦以54∶16的比例混合后,釩尾礦和水泥在固體干料中的質量分數為80%、20%;水與固體干料的質量比,PC減水劑摻入量為14%、0.3%時,可以制得28d抗折強度達到6.8MPa,抗壓強度達到20.3MPa的釩尾礦免燒磚,符合免燒磚MU20等級的要求,是本試驗制備普通水泥摻雜釩尾礦免燒磚的最佳配合比。 Abstract:Vanadium tailings baking-free bricks were produced by using different ratio of raw materials and their relative mechanical characteristics were tested. The results showed that, when the coarse tailings and fine tailings was mixed with ratio of 54:16, the mass fraction of cement and vanadium tailings is 20%, 80% respectively, when the water-solid dry material ratio is 14% and water-PC water reducing agent is 0.3% respectively, the 28d flexural strength and compressive strength can reach 6.8MPa and 20.3MPa respectively.
    輕質土的原材料及強度特性試驗研究
    輕質土的原材料及強度特性試驗研究
    • 李章珍,唐 浩,高鳳春,趙國棟
    2016年第9期
    摘要
    引用本文
    摘 要:氣泡混合輕質土的性能主要受發泡劑以及原料土摻入量的影響,本文通過室內試驗找到了發泡劑和原料土的合理摻入量,并通過對試驗結果的綜合分析,探討了氣泡混合輕質土強度指標隨氣泡和原料土的摻入量變化的規律。 Abstract: The performance of Foamed Cement Banking (FCB) is mainly affected by the foaming agent and the original soil content, the reasonable content of foaming agent and the original soil were found by the laboratory test. The results of the comprehensive analysis showed the change law of the FCB strength index with the air bubble and the content of the original materials.
    稻草纖維微粒水泥板抗震性能的研究
    稻草纖維微粒水泥板抗震性能的研究
    • 周孝紅,陳國平,石建軍
    2016年第9期
    摘要
    引用本文
    摘 要:通過對二榀帶構造柱的縮尺墻體模型進行擬靜力試驗,研究了結構的破壞特征、承載力、延性、耗能能力等,對比分析了不同材料及施工工藝對結構破壞特性和抗震性能的影響。結果表明,與普通墻體相比,稻草纖維微粒水泥板組成的構件不僅具有較高的承載力和較大位移,相應的抗震性能也較為優越,是一種具有廣闊應用前景的建筑材料。 Abstract: Based on the pseudo-static test of 2 specimens with constructional column wall, the failure character bearing capacity, ductility and energy dissipation capacity of the structure were studied, the influence of different materials and construction technology on the failure characteristics and seismic performance were compared and analyzed. The results showed that, compared with the traditional wall, the straw fiber reinforced cement board not only has higher bearing capacity and larger displacement, the corresponding seismic performance is also superior. This is a building material with wide application prospect.
    機制砂濕拌砂漿配合比優化試驗研究
    機制砂濕拌砂漿配合比優化試驗研究
    • 石永良,王玉麟
    2016年第9期
    摘要
    引用本文
    摘 要:分析了粉煤灰、增稠保水劑、引氣劑摻量以及機制砂石粉含量對濕拌砂漿性能的影響,通過正交試驗對機制砂濕拌砂漿的配比進行了優化,確定了粉煤灰、增稠保水劑、引氣劑最佳摻量分別為12%、1.8%、0.2‰,機制砂中最佳石粉含量為10%,按其配制的機制砂濕拌砂漿性能優異。 Abstract: The effects of fly ash, water retentive agent, air entraining agent and the stone powder content of manufactured sand on the properties of wet-mixed mortar were analyzed. By orthogonal test, the mix proportion of manufactured sand wet-mixed mortar was optimized, the optimum contents of fly ash, water retentive agent, air entraining agent in mortar are 12%、1.8%、0.2‰ respectively and the optimum stone powder content of manufactured sand is 10%, the wet-mixed mortar with these optimum contents have the excellent performances.
    不同纖維活性粉末混凝土基本性能研究
    不同纖維活性粉末混凝土基本性能研究
    • 賈方方1,王萬金1,賀 奎1,夏義兵1,王 靖1,查炎鵬1,孔德成2
    2016年第9期
    摘要
    引用本文
    摘 要:選取玄武巖纖維和聚丙烯粗纖維制備活性粉末混凝土,研究了纖維種類和摻量對活性粉末混凝土流動性、抗壓強度、劈拉強度、抗折強度的影響規律,并與鋼纖維進行了對比分析。根據試驗結果,給出了每種纖維的最佳摻量。 Abstract: Basalt fiber and polypropylene crude fibers were selected to prepare the Reactive Power Concrete. The influence of fiber type and content on the liquidity, compressive strength,splitting tensile strength, flexural strength of Reactive Powder Concrete was studied. Compared with steel fibers, the optimum content of each type of fiber were presented.
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