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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第十期

    鐵尾礦砂摻量對混凝土性能的影響
    鐵尾礦砂摻量對混凝土性能的影響
    • 姚 雷,李曉芝,魯明星
    2019年第10期
    摘要
    引用本文
    摘 要:按普通混凝土配合比設計的方法配制強度等級為C30、C40、C50的混凝土,通過對天然細砂、人工粗砂、鐵尾礦砂進行級配優化后,研究了不同摻量的鐵尾礦砂對不同強度等級混凝土基本性質的影響。結果表明,摻入鐵尾礦砂后混凝土拌合物的和易性下降,且摻量越大,混凝土坍落度及擴展度越??;用鐵尾礦砂配制的C30、C40混凝土,其強度略高于普通混凝土,且隨鐵尾礦砂摻量增加而略有增加,但用鐵尾礦砂配制的C50混凝土,其強度略低于普通混凝土。 Abstract: C30, C40 and C50 concrete were prepared by the method of proportion design of ordinary concrete. After the gradation optimization of natural fine sand, artificial coarse sand and iron tailings, the influence of iron tailings additive amount on the basic properties of various strength grade concrete was studied. The results show that the workability of mixing concrete with iron tailing sand decreases. The greater the amount of iron tailing sand in the concrete mix, the lower the measured values of slump and expansion. The strength of C30 and C40 concrete prepared with iron tailing sand are slightly higher than that of ordinary concrete respectively, and slightly increases with the increase of iron tailing sand content. But the strength of C50 concrete prepared with iron tailing is slightly lower than that of C50 ordinary concrete.
    姚雷,李曉芝,魯明星.鐵尾礦砂摻量對混凝土性能的影響[J].混凝土與水泥制品,2019(10):97-100. YAO L,LI X Z,LU M X.Effect of Iron Tailings Content on Performance of Concrete[J].China Concrete and Cement Products,2019(10):97-100.
    原狀稻殼灰及磨細灰對水泥膠砂強度和微觀結構的影響
    原狀稻殼灰及磨細灰對水泥膠砂強度和微觀結構的影響
    • 楊一凡,何智海
    2019年第10期
    摘要
    引用本文
    摘 要:針對當前原狀稻殼灰儲量大,難以資源化利用的困境,研究了原狀稻殼灰及其粉磨對水泥膠砂強度的影響,結合掃描電鏡和氮吸附法分析其影響機理,同時比較其與粉煤灰對膠砂性能的影響。結果表明,原狀稻殼灰顯著降低了水泥膠砂強度,且隨著其摻量的增加,其降低幅度越來越大;原狀稻殼灰粉磨極大地增加了膠砂強度,與基準膠砂強度相近,大于粉煤灰膠砂;原狀稻殼灰劣化了膠砂內部結構,且隨著其摻量地增加,其內部結構越來越疏松多孔;原狀稻殼灰粉磨有利于改善細化其內部孔結構。 Abstract: At present, there are large reserves of rice husk ash without processing which is difficult to be utilized as resource, so the effect of rice husk ash without processing and its grind product on the strength of cement mortar was studied, and the mechanism was analyzed and revealed by the scanning electron microscopy and nitrogen adsorption method, which was also compared with the effect of fly ash. The results indicate that rice husk ash without processing obviously reduces the strengths of cement mortar, and with the increase of its content, the reduction is larger and larger. However, the grind product of rice husk ash without processing greatly increases the strengths of cement mortar, close to those of the control mortar and more than those of cement mortar containing fly ash. Rice husk ash without processing degrades the internal structure of cement mortar, which is looser and looser with the increase of its content. The grind product of rice husk ash without processing is beneficial to refining and improving the internal pore structure.
    楊一凡,何智海.原狀稻殼灰及磨細灰對水泥膠砂強度和微觀結構的影響[J].混凝土與水泥制品,2019(10):92-96. YANG Y F,HE Z H.Effect of undisturbed rice husk ash and ground ash on strength and microstructure of cement mortar[J].China Concrete and Cement Products,2019(10):92-96.
    垃圾焚燒底渣粉磨工藝及再生微粉強度特征
    垃圾焚燒底渣粉磨工藝及再生微粉強度特征
    • 董 云1,劉 暢1,2,張國瀛1,2,李偉華3,王 瑯3,鄒易君1,2
    2019年第10期
    摘要
    引用本文
    摘 要:為提高城市生活垃圾焚燒底渣的再生利用價值,以0.18 mm通過率和比表面積作為控制指標進行了不同轉速、球磨時間的垃圾焚燒底渣球磨對比試驗,并采用不同比表面積的底渣再生微粉內摻替代水泥進行膠砂強度試驗。結果表明,垃圾焚燒底渣材質較輕且易于研磨,再生微粉的細度容易達到并遠大于水泥的細度;在一定范圍內提高轉速,可提高再生微粉0.18 mm通過率和比表面積,有效縮短研磨時間;垃圾焚燒底渣再生微粉具有與水泥類似的化學成分及凝膠活性,最大強度活性指數約為57%;細度對再生微粉的膠砂強度影響較為顯著,隨微粉細度增加,再生微粉膠砂強度總體上呈現先增加后減小的變化趨勢;再生微粉對膠砂早期強度影響較小,但會導致膠砂強度增長速度明顯變緩。 Abstract: In order to improve the recycling value of waste incinerator residues, the comparison test of waste incineration bottom slag ball mill with different rotational speed and ball milling time was carried out by using the control index of 0.18 mm passing rate and specific surface area, and the cement strength test was carried out with different specific surface area of regenerated powder of bottom slag instead of cement. The results show that the waste incinerator residue is lighter and easier to grind, the fineness of regenerated powder is easy to reach and much larger than that of cement. Increasing the grinding speed in a certain range can improve the 0.18 mm passing rate and specific surface area of the regenerated powder, and effectively shorten the grinding time. The regenerated powder of waste incinerator residues has similar chemical composition and gel activity to cement, and the maximum strength activity index is about 57%. The fineness has a significant effect on the mortar strength of regenerated powder which generally shows a trend of first increasing and then decreasing with the increase of fineness. The regenerated powder has little effect on the early mortar strength, but will slow down the growth rate of mortar strength obviously.
    董云,劉暢,張國瀛,等.垃圾焚燒底渣粉磨工藝及再生微粉強度特征[J].混凝土與水泥制品,2019(10):87-91. DONG Y,LIU C,ZHANG G Y,et al.Grinding Technology of the Waste Incineration Residue and Strength Characteristics of Regenerated Power[J].China Concrete and Cement Products,2019(10):87-91.
    綠色環?;炷翑嚢枵镜乃膹U處理
    綠色環?;炷翑嚢枵镜乃膹U處理
    • 滿麗瑩1,王裕銀1,2,李酉成1,謝一飛1,張 蕊1,田 寅1
    2019年第10期
    摘要
    引用本文
    摘 要:根據混凝土攪拌站綠色設計的要求,分析了混凝土攪拌站綠色環?;M程中的設計理念和實現途徑,闡述了混凝土生產過程中廢水的回收、利用方式,固體廢棄物的處理與應用途徑,抑塵和降噪的措施,為混凝土攪拌站的綠色環保設計和生產提供參考。 Abstract: According to the requirement of environment-friendly design of concrete mixing station, the design concept and implement way for the process of concrete batching plant are introduced, and the treatment and reuse of the waste water and solid waste and the way to limit dust and nose produced during production of concrete are disscued, which can provide references for the environment-friendly design and production of the concrete batching plant.
    滿麗瑩,王裕銀,李酉成,等.綠色環?;炷翑嚢枵镜乃膹U處理[J].混凝土與水泥制品,2019(10):84-86. MAN L Y,WANG Y Y,LI Y C,et al.Treatment of Four Kinds of Wastes from Green Concrete Batching Plant[J].China Concrete and Cement Products,2019(10):84-86.
    裝配式住宅工程產業化施工措施分析
    裝配式住宅工程產業化施工措施分析
    • 蘇永波1,王肖方2,單賀明1
    2019年第10期
    摘要
    引用本文
    摘 要:以北京市某安置房項目為例,分析了裝配式住宅工程產業化施工原理、準備事項,介紹了其施工中的關鍵技術,例如模架支設、預制板的安裝、疊合板夾縫處理、鋼筋綁扎、機電管線埋設及混凝土的澆筑、預制樓梯安裝??蔀轭愃谱≌こ坍a業化施工提供經驗和參考。 Abstract: A resettlement house project in Beijing was used as an example, and the industrialization construction principles and preparations of the prefabricated residential engineering were analyzed, and the key technologies in the construction such as mold frame support, prefabricated plate installation, laminated plate quilting treatment, steel bar lashing, electromechanical pipeline burying and concrete pouring, and prefabricated stair installationare were introduced, which can provide experience and reference for similar residential engineering industrialization construction.
    蘇永波,王肖方,單賀明.裝配式住宅工程產業化施工措施分析[J].混凝土與水泥制品,2019(10):80-83. SU Y B,WANG X F,SHAN H M.Analysis of Construction Measures for Industrialization of Assembled Residential Engineering[J].China Concrete and Cement Products,2019(10):80-83.
    預制混凝土襯砌管片模具的研究與改進
    預制混凝土襯砌管片模具的研究與改進
    • 劉錦濤
    2019年第10期
    摘要
    引用本文
    為提高混凝土管片模具精度和產品生產效果,針對混凝土管片模具的側模開合方式、封閉結構、預埋件固定方式進行了研究,并設計了優化方案,供裝備企業參考借鑒。 Abstract: In order to improve the precision of the concrete segment mould and the production effect of the product, the side die opening and closing mode, closed structure and embedded parts fixing mode of the concrete segment die were studied, and the optimization scheme was designed for the reference of equipment enterprises.
    劉錦濤.預制混凝土襯砌管片模具的研究與改進[J].混凝土與水泥制品,2019(10):77-79. LIU J T.Research and Improvement of Precast Concrete Lining Segment Mould[J].China Concrete and Cement Products,2019(10):77-79.
    不同軸壓比火后框架節點加固抗震性能數值分析
    不同軸壓比火后框架節點加固抗震性能數值分析
    • 王錦燕,岳幸超
    2019年第10期
    摘要
    引用本文
    摘 要:數值模擬了鋼板加固火后混凝土框架節點的抗震性能,分析了軸壓比對加固節點包括滯回曲線、承載能力、耗能、應力分布的影響。結果表明:相比于火后未加固節點,鋼板加固后的節點在不同軸壓比下彈性階段承載力幾乎不變,但極限承載力、耗能能力、延性均有不同程度的變化;當軸壓比為0.5時,極限承載力、耗能能力相比未加固分別提高了8.2%、3.2%,表現出理想的抗震效果;隨著軸壓比的增大,節點應力分布從低軸壓比下的梁端處的高應力區轉變為高軸壓比下的柱子的高應力分布,結構的破壞形式發生改變。 Abstract: The seismic behavior of concrete frame joint strengthened by steel plates after fire was simulated numerically. Hysteretic curve, bearing capacity, energy dissipation and stress distribution were analyzed under different axial compression ratio. The results show that the bearing capacity in elastic phase almost unchanged at different axial compression ratios, but ultimate bearing capacity, energy dissipation capacity and ductility of the strengthened joints change differently. The ultimate bearing capacity and energy dissipation capacity of strengthened concrete frame joint are increased by 8.2% and 3.2% respectively when the axial compression ratio is 0.5, showing an ideal seismic effect. With the increase of axial compression ratio, the stress distribution of the strengthened joints changes from the high stress region at the end of beam under low axial compression ratio to the high stress distribution of column under high axial compression ratio. The failure mode of structure is changed.
    王錦燕,岳幸超.不同軸壓比火后框架節點加固抗震性能數值分析[J].混凝土與水泥制品,2019(10):74-76. WANG J Y,YUE X C.Numerical Analysis on the Seismic Performance of Reinforced Post-fire Steel Concrete Frame Joints under Different Axial Compression Ratio[J].China Concrete and Cement Products,2019(10):74-76.
    不同疲勞荷載和環氧涂層厚度下鋼筋混凝土構件力學性能研究
    不同疲勞荷載和環氧涂層厚度下鋼筋混凝土構件力學性能研究
    • 桂世杰,陳 瑜,王小惠
    2019年第10期
    摘要
    引用本文
    摘 要:為討論不同疲勞荷載范圍和鋼筋涂層厚度對服役帶環氧涂層鋼筋混凝土構件力學性能的影響,設計了兩組共10根不同涂層厚度的鋼筋混凝土試件,分別對其進行50萬次、不同疲勞荷載上、下限的加載,并對試件的跨中撓度、鋼筋的應變分布進行了分析。分析結果表明:承受較大上、下限疲勞荷載的無涂層和環氧涂層鋼筋混凝土試件,相比承受較小上、下限疲勞荷載的同類試件,無涂層鋼筋混凝土試件跨中撓度因疲勞荷載上、下限引起的差距隨疲勞加載次數的增加而縮??;而涂層鋼筋混凝土試件的跨中撓度因疲勞荷載上、下限引起的差距則隨加載次數的增加有增大趨勢;較大的疲勞荷載產生較大的鋼筋應變;較厚涂層鋼筋混凝土試件間的鋼筋應變均值的差異明顯。 Abstract: In order to study the influence of different fatigue load range and load upper limit as well as coating thicknesses of the reinforcing bars on the service performance of reinforced concrete (RC) elements, 10 RC test specimens with uncoated and epoxy-coated reinforcements in two groups were experimentally loaded under different fatigue loads, where two peak fatigue loads and 500 000 loading cycles were considered. Mid-span deflection of the test specimens and steel strain distribution of the reinforcements were mainly studied. It is concluded that, for uncoated test specimens, E0.2 test specimens (i.e., 200-μm epoxy coating) and E0.6 test specimens (i.e., 600-μm epoxy coating) in two groups, when they were subjected to fatigue load with larger load range and load upper limit, larger steel strain and mid-span deflection of the test specimens were observed. With the increments of fatigue cycles, the mid-span deflection and average steel strain difference between the uncoated test specimens in two groups decreased while those differences between the same types of the coated test specimens slightly increased, especially for the coated test specimens with thicker epoxy coating thickness.
    桂世杰,陳瑜,王小惠.不同疲勞荷載和環氧涂層厚度下鋼筋混凝土構件力學性能研究[J].混凝土與水泥制品,2019(10):68-73. GUI S J,CHEN Y,WANG X H.Performance of RC Test Specimens with Uncoated and Epoxy-coated Reinforcements under Different Fatigue Loads[J].China Concrete and Cement Products,2019(10):68-73.
    基于電阻率法的硫鋁酸鹽水泥泡沫混凝土凝結時間研究
    基于電阻率法的硫鋁酸鹽水泥泡沫混凝土凝結時間研究
    • 任申瑞1,張楠楠1,楊 毅2,黃 芳2,魯劉磊1,汪峻峰1
    2019年第10期
    摘要
    引用本文
    摘 要:基于電阻率法測定了硫鋁酸鹽水泥凈漿與泡沫混凝土的電阻率-時間特征曲線,探究了曲線中特征點與初凝時間的關系,提出了泡沫混凝土初凝時間的測定方法。試驗結果表明:凈漿的電阻率特征曲線能間接反映其水化進程,凈漿電阻率特征曲線可劃分為潛伏期、凝結期、硬化期,其潛伏期與凝結期的拐點與其初凝時間點存在線性相關;泡沫混凝土電阻率特征曲線可劃分為穩泡期、潛伏期、凝結期、硬化期,其初凝時間點為電阻率特征曲線中潛伏期與凝結期的拐點。電阻率法可用于測定泡沫混凝土的初凝時間,終凝時間的測定還有待進一步研究。  Abstract: Based resistivity method, the resistivity-time characteristic curve of sulpho-aluminate cement paste and foam concrete was determined. The relationship between resistivity characteristic point and the initial setting time was investigated. The test results show that the resistivity characteristic curve of the paste can indirectly reflect the hydration process. The resistivity curve of slurry can be divided into latent period, condensation period and hardening period. There is a correlation between the initial setting time point and characteristic point between latent period and condensation period; the resistivity characteristic curve of foam concrete is divided into the foam stabilization period, the latent period, the condensation period and the hardening period, and its initial setting time point is the characteristic point between latent period and condensation period. The resistivity method can be used to determine the initial setting time of foam concrete, and the determination of the final setting time needs further investigation.
    任申瑞,張楠楠,楊毅,等.基于電阻率法的硫鋁酸鹽水泥泡沫混凝土凝結時間研究[J].混凝土與水泥制品,2019(10):63-67. REN S R,ZHANG N N,YANG Y,et al.Study on Setting Time of Sulphoaluminate Cement Foam Concrete Based on Resistivity Method[J].China Concrete and Cement Products,2019(10):63-67.
    鹽溶液環境下砂漿裂縫的自愈合行為
    鹽溶液環境下砂漿裂縫的自愈合行為
    • 石寶存,張士萍,顧云凡,陳 瑋,魏 凱
    2019年第10期
    摘要
    引用本文
    摘 要:通過超聲波波速恢復率、毛細吸水量、裂縫寬度分析了不同濃度的NaCl 和Na2SO4鹽溶液對砂漿裂縫自修復效果的影響,研究了高分子修復劑對裂縫修復效果的促進作用。結果表明,鹽溶液的濃度對裂縫愈合性能具有一定的影響,在NaCl 和Na2SO4溶液中隨著濃度(4%、6%)的升高,裂縫的愈合程度也隨之提高;當摻入1%裂縫修復劑后,濃度為6%NaCl鹽溶液對砂漿裂縫修復的效果最佳,修復程度達到98.58%。 Abstract: The effects of different concentrations of NaCl and Na2SO4 salt solution on the self-repairing effect of mortar cracks were analyzed by ultrasonic wave velocity recovery rate, capillary water absorption and crack width detection, and the effect of polymer repair agent on crack was studied. The results show that the concentration of salt solution has a certain effect on the fracture healing performance, in the NaCl and Na2SO4 solutions, with the increase of the concentration (4%, 6%) of NaCl and Na2SO4, the crack healing degree also increases. When 1% crack repair agent is added, the concentration of 6% NaCl salt solution has the best effect on the repair of mortar cracks, and the crack repair degree reaches 98.58%.
    石寶存,張士萍,顧云凡,等.鹽溶液環境下砂漿裂縫的自愈合行為[J].混凝土與水泥制品,2019(10):58-62. SHI B C,ZHANG S P,GU Y F,et al.Self-healing Behavior of Mortar Cracks in Salt Solution Environments[J].China Concrete and Cement Products,2019(10):58-62.
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