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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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    第十一期

    廢棄混凝土再生微粉膠凝性能的試驗研究
    廢棄混凝土再生微粉膠凝性能的試驗研究
    • 陳 曦,李 瀅,莊平英
    2019年第11期
    摘要
    引用本文
    摘 要: 研究了實驗室破碎廢棄混凝土過程中產生的再生微粉的性能,并將再生微粉以不同比例摻入水泥凈漿、砂漿及混凝土中,研究其影響規律。結果表明,再生微粉具有潛在活性,可以替代水泥膠凝材料;隨著再生微粉取代率的增加,水泥凈漿標準稠度用水量增加、凝結時間延遲,水泥膠砂流動度減??;當再生微粉取代率大于20%時,砂漿強度降低明顯;當再生微粉取代率為20%時,混凝土各齡期強度均為最高,其28 d抗壓強度達到48.16 MPa;隨著水化齡期的增加,各取代率下的強度比差異越來越小,再生微粉混凝土后期強度增長較快。 Abstract: The properties of the recycled fine powder(RFP) produced in the process of crushing waste concrete in the laboratory were studied, and the RFP was mixed into cement paste, mortar and concrete in different proportions to investigate its influencement. The results show that the RFP has potential activity and can replace cementitious materials. With the increase of the replacement rate of RFP, the water consumption of cement paste standard consistency increases and the setting time of cement paste is delayed, and the fluidity of cement mortar decreases. The strength of mortar decreases when the replacement rate of RFP exceeds 20%. When the replacement rate of RFP is 20%, the strength of concrete at each age is the highest, and the 28 d compressive strength of concrete reaches 48.16 MPa. With the increase of hydration age, the strength ratio under each substitution rate is getting smaller and smaller, and the strength of concrete at late age grows faster.
    陳曦,李瀅,莊平英.廢棄混凝土再生微粉膠凝性能的試驗研究[J].混凝土與水泥制品,2019(11):96-100. CHEN X,LI Y,ZHUANG P Y.Experimental Study on Cementitious Properties of Recycled Fine Powder from Waste Concrete[J].China Concrete and Cement Products,2019(11):96-100.
    ?;郀t礦渣代砂高性能水泥基材料力學性能正交試驗
    ?;郀t礦渣代砂高性能水泥基材料力學性能正交試驗
    • 石東升1,李 科1,薛欣欣1,韓佳彤2
    2019年第11期
    摘要
    引用本文
    摘 要:基于正交分析法研究了不同因素對?;郀t礦渣代砂高性能水泥基材料力學性能的影響。通過分析水膠比、代砂率和養護制度三種因素對高性能水泥基材料力學性能的影響,確定了不同因素對抗壓強度影響的主次順序以及各因素的最優水平組。結果表明,不同因素對抗壓強度影響的主次順序均為:養護條件>水膠比>代砂率;對抗折強度影響的主次順序為:代砂率>水膠比>養護條件;抗壓強度隨著水膠比的增大而降低,隨著代砂率的增大而呈現出先增大后減小的趨勢,而抗折強度隨著水膠比與代砂率的增大均呈下降趨勢;相比于標準養護,蒸壓與低壓蒸汽養護均能提高?;郀t礦渣代砂高性能水泥基材料的抗壓強度,且蒸壓養護>低壓蒸汽養護>標準養護;顯微測試結果表明,采用?;郀t礦渣代替細骨料能夠有效提高水泥基材料的抗壓強度。 Abstract: Based on the orthogonal analysis method, the effects of different factors on the mechanical properties of high performance cement-based materials containing granulated blast furnace slag (GBFS) as fine aggregate were studied. By analyzing the effects of water-binder ratio, sand replacement ratio and curing schedule on the mechanical properties of high performance cement-based materials, the important order of the influence of different factors on the compressive strength and the optimal level of each factor were determined. The results show that the important order of different factors on the compressive strength is: curing schedule > water- binder ratio > sand replacement ratio. The important order of different factors on the flexural strength is: sand replacement ratio > water-binder ratio > curing schedule. The compressive strength decreases with the increase of water-binder ratio, the compressive strength increases first and then decreases with the increase of sand replacement ratio, the flexural strength decreases with the increase of water-to-binder ratio and sand replacement ratio. Both autoclave and steam curing can improve the compressive strength of GBFS high performance cement-based materials for sand replancement, and autoclave curing > low pressure steam curing > standard curing. Microscopic test results show that using granulated blast furnace slag instead of fine aggregate can effectively improve the compressive strength of cement-based materials.
    石東升,李科,薛欣欣,等.?;郀t礦渣代砂高性能水泥基材料力學性能正交試驗[J].混凝土與水泥制品,2019(11):92-95. SHI D S,LI K,XUE X X,et al.Mechanical Properties of High Performance Cement-based Materials for Granulated Blast Furnace Slag Based on Orthogonal Test[J].China Concrete and Cement Products,2019(11):92-95.
    基于泡沫混凝土技術的橋頭跳車處治研究
    基于泡沫混凝土技術的橋頭跳車處治研究
    • 吳穎峰
    2019年第11期
    摘要
    引用本文
    摘 要:路橋過渡段用泡沫混凝土代替傳統的填料進行澆筑,為緩解橋頭跳車問題提供了一種新的途徑。本文進行正交設計試驗,對泡沫混凝土的抗壓強度、吸水率和流動度等指標進行了分析研究;通過驗證試驗確定了最終的推薦最佳組合,并提出了標準化施工工藝流程與相應的施工要求。 Abstract: Traditional filler is replaced by foam concrete between the abutment and the subgrade, which can alleviate bump at approaches to the bridge. The orthogonal test is carried out to analyze the compressive strength, water absorption rate and fluidity of foam concrete. The best recommended combination is determined by verification test, and the standardized construction process and corresponding construction requirements are proposed.
    吳穎峰.基于泡沫混凝土技術的橋頭跳車處治研究[J].混凝土與水泥制品,2019(11):85-88. WU Y F.Research on Treatment of Bump at Approaches to the Bridge Based on Foam Concrete Technique[J].China Concrete and Cement Products,2019(11):85-88.
    中美砌體結構技術標準對比研究
    中美砌體結構技術標準對比研究
    • 方 坤1,姚國友2,楊林麗3,唐文哲1
    2019年第11期
    摘要
    引用本文
    摘 要:以中美兩國砌體結構技術標準為研究對象,從標準體系、邏輯結構和具體條款等方面出發,對比了中國GB 50003—2011《砌體結構設計規范》和美國ACI530—2011《砌體結構規范》的異同,闡述了兩者的特點及差異,分析了各自的細致程度及對工期、造價等的影響,分析結論可為國際工程順利開展提供技術支持和履約保障。 Abstract: The technical standards of masonry structure between China and the United States was compared. From the aspects of standard system, logical structure and specific terms, the Chinese National Standard GB 50003—2011"Code for design of masonry structures" and the American Concrete Association standard ACI 530—2011"Building Code Requirements and Specification for Masonry Structures". Specifically, the characteristics and differences of the standards were showed and their impact on construction period, cost, etc were analyzed. The results can provide assistance for two development of international projects and provide guarantee for strengthening the performance capability.
    方坤,姚國友,楊林麗,等.中美砌體結構技術標準對比研究[J].混凝土與水泥制品,2019(11):82-84. FANG K,YAO G Y,YANG L L,et al.Comparative Study on the Technical Standards of Masonry Structures between China and the United States[J].China Concrete and Cement Products,2019(11):82-84.
    JG/T 408—2013《鋼筋連接用套筒灌漿料》修訂及專項試驗     研究介紹
    JG/T 408—2013《鋼筋連接用套筒灌漿料》修訂及專項試驗 研究介紹
    • 蔣勤儉1,吳煥娟1,錢冠龍2,張亞梅3,沙建芳4,李晨光5
    摘要
    引用本文
    摘 要:JG/T 408—2013《鋼筋連接用套筒灌漿料》標準修訂對套筒灌漿料的技術性能試驗研究以及灌漿施工時不同環境溫度類別(低溫、常溫)提出了新的要求,并結合工程應用,對材料要求、試驗要求等章節進行了修改完善,以更好地保證套筒灌漿連接施工質量。本文對該標準主要修訂內容和相關試驗研究進行了介紹。 Abstract:The revision of JG/T 408—2013 Cementitious Grout for Sleeve of Rebar Splicing has put forward new requirements for the technical performance test and research of sleeve grouting material and different environmental temperature categories (low temperature and normal temperature) during grouting construction. Combined with the engineering application, the material requirements, test requirements and other chapters are modified and improved to better ensure the construction quality of sleeve grouting connection. Here, the main revisions of the standard and related experimental research are introducesd.
    蔣勤儉,吳煥娟,錢冠龍,等.JG/T 408—2013《鋼筋連接用套筒灌漿料》修訂及專項試驗研究介紹[J].混凝土與水泥制品,2019(11):78-81. JIANG Q J,WU H J,QIAN G L,et al.Revision Introduction of JG/T 408 — 2013 Cementitious Grout for Sleeve of Rebar Splicing and Special Test Research[J].China Concrete and Cement Products,2019(11):78-81.
    早強劑對修補砂漿力學性能和黏結性能的影響研究
    早強劑對修補砂漿力學性能和黏結性能的影響研究
    • 馬建斌
    2019年第11期
    摘要
    引用本文
    摘 要:高性能修補砂漿能夠較好地彌補由環境侵蝕引起的混凝土結構表面破壞、保護層脫落及鋼筋外露等缺陷。為研制高性能修補砂漿,首先加入甲酸鈣和乙酸鈣兩種早強劑來提高普通硅酸鹽水泥砂漿的早期抗折強度和抗壓強度,并探究了聚合物摻量對其黏結強度的影響。結果表明,兩種早強劑的最佳摻量分別為1%和0.5%,聚合物的最佳摻量為10%。 Abstract: Defects such as surface damage of concrete structures, peeling off of protective layers and exposed steel bars caused by environmental erosion can be well compensated by high performance repair mortar. In order to develop high performance repair mortar, two early strength agents of calcium formate and calcium acetate were first added to improve the early flexural strength and compressive strength of ordinary Portland cement mortar, and the effect of polymer content on its bond strength was explored. The results show that the optimum dosage of the two early strength agents is 1% and 0.5% respectively, and the optimum dosage of the polymer is 10%.
    馬建斌.早強劑對修補砂漿力學性能和黏結性能的影響研究[J].混凝土與水泥制品,2019(11):74-77. MA J B.Effect of Early Strength Agent on Mechanical Properties and Bonding Properties of Repairing Mortar[J].China Concrete and Cement Products,2019(11):74-77.
    柱端箍筋不同加密的鋼筋混凝土柱的抗震性能分析
    柱端箍筋不同加密的鋼筋混凝土柱的抗震性能分析
    • 張炳暉,楊玉紅,趙亞濤,包恩和,陳宜虎
    2019年第11期
    摘要
    引用本文
    摘 要:為進一步明確柱端箍筋配置對鋼筋混凝土柱的抗震性能影響,以柱端箍筋配置為主要研究參量,澆注4根鋼筋混凝土柱試件。對各試件進行反復加載試驗,研究各試件的滯回曲線、骨架曲線、承載能力、剛度退化及能量耗散系數等。結果表明,對柱端軸向0~250 mm范圍內的箍筋進行加密,有增大試件的最大承載力和控制試件破壞之前的剪切變形量的作用;隨著箍筋加密區的增大,試件的延性和耗能性能提升;隨著加載循環次數的增大,各試件的承載力和剛度減小。 Abstract: In order to investigate the influence of different stirrup configurations at column ends on the seismic performance of RC column, the stirrup configurations at column ends was taken as the main research parameters, and four sets of RC column specimens were designed. Reversed cyclic loading tests were conducted on each specimen to study the hysteretic curve, skeleton curve, bearing capacity, stiffness degradation and energy dissipation coefficient. The results show that encrypting the stirrups in the range of 0~250 mm in the axial direction of the column ends can increase the maximum bearing capacity of specimens and control the degree of shear deformation before the failure of specimens. With the decrease of the stirrup spacing in stirrups encryption area at column ends, the ductility and energy dissipation capacity of the specimen increases. With the loading cycles increase, the bearing capacity and stiffness of each specimen decrease.
    張炳暉,楊玉紅,趙亞濤,等.柱端箍筋不同加密的鋼筋混凝土柱的抗震性能分析[J].混凝土與水泥制品,2019(11):70-73+77. ZHANG B H,YANG Y H,ZHAO Y T,et al.Analysis of Seismic Performance of Reinforced Concrete Columns with Different Encryption of Column End Stirrups[J].China Concrete and Cement Products,2019(11):70-73+77.
    預濕骨料對陶?;炷列阅苡绊懙脑囼炑芯? />
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                          <a href="/product/218.html" target="_parent" class="title"><i class="iconfont12"></i>預濕骨料對陶?;炷列阅苡绊懙脑囼炑芯?/a>
                        
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                                      <span class="attrValue"><i class="iconfont2"></i> 穆龍飛,李思琪,馮竟竟,楊進波</span>
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                                      <span class="attrValue"> 2019年第11期  </span>
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                            <div class="zhai"><i class="iconfont11"></i>摘要</div>
                            <div class="zhai1"><i class="iconfont11"></i>引用本文</div>
                            <span class="newMs">摘   要:為研究陶粒飽水程度對陶?;炷亮W性能及熱工性能的影響,設置了六組不同預濕時間的試驗組進行探究。結果表明,陶粒預濕時間越長,陶?;炷? d強度越低,28 d強度越高;陶?;炷翆嵯禂蹬c蓄熱系數隨陶粒骨料飽水程度的增加而有所提升;陶粒預濕后期存在釋水現象,釋出水分補充到陶粒骨料與漿體連接面,供給膠凝材料持續硬化。
Abstract: Six experimental groups with different prewetting time were set up to investigate the effect of the degree of water content on the mechanical properties and thermal properties of ceramsite concrete. The results show that the longer the prewetting time of ceramsite concrete, the lower of its 7 days strength and the higher of its 28 days strength. The thermal conductivity and heat storage coefficient of the ceramsite concrete improve with the increase of the degree of water fullness of the ceramsite concrete. There is water release phenomenon in the post-prewetting stage of ceramsite grains, and it supplements the water content of the connection surface between the ceramsite aggregate and the mortar, and supplies the cement material for continuous hardening.</span>
                         
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                                      <span class="attrValue3"> 穆龍飛,李思琪,馮竟竟,等.預濕骨料對陶?;炷列阅苡绊懙脑囼炑芯縖J].混凝土與水泥制品,2019(11):66-69.
MU L F,LI S Q,FENG J J,et al.Study on Effect of Prewet Aggregate on Performance of Ceramsite Concrete[J].China Concrete and Cement Products,2019(11):66-69.</span>
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    凍融作用下煤矸石陶?;炷亮踊幝杉皦勖A測
    • 邱繼生,王 斌,關 虓,熊光紅,秦 卿
    2019年第11期
    摘要
    引用本文
    摘 要:通過對不同煤矸石陶粒摻量(0、20%、40%、60%)的混凝土進行快速凍融循環試驗,探究了凍融循環后煤矸石陶?;炷恋谋砻媪踊?、質量損失率和相對動彈性模量的變化規律,以不同凍融循環次數下煤矸石陶?;炷恋膭訌椥阅A繛閾p傷變量,建立了煤矸石陶?;炷羶鋈趽p傷劣化模型,并對其在自然凍融環境下的壽命進行了預測。研究結果表明,隨著凍融循環次數的增加,煤矸石陶?;炷恋目箖鲂阅苤饾u降低,但降低幅度有所不同;隨著煤矸石陶粒取代率的增加,混凝土的抗凍性能呈現先下降后提高再下降的趨勢;建立的煤矸石陶?;炷羶鋈趽p傷劣化模型與試驗結果符合較好,具有較高的精度;當煤矸石陶粒摻量為40%時,混凝土的抗凍性能效果最佳,抗凍耐久性壽命最長。 Abstract: The rapid freeze-thaw cycling tests of concrete blocks with different content of coal gangue ceramsite (0, 20%, 40%, 60%) were carried out to study the variation regularities of surface deterioration, mass loss rate and relative dynamic elastic modulus of coal gangue ceramsite concrete after freeze-thaw cycling, and the dynamic elastic modulus of coal gangue ceramsite concrete with different freeze-thaw cycles was used as the damage variable and the freeze-thaw damage deterioration model of coal gangue ceramsite concrete was established and its life under natural freeze-thaw environment was predicted. The results show that with the increase of freeze-thaw cycles, the frost-resistance of coal gangue ceramsite concrete decreases gradually, but the decreasing range is different. With the increase of the replacement rate of coal gangue ceramsite, the frost-resistance of concrete decreases first, then increases and then decreases. The freeze-thaw damage deterioration model of coal gangue ceramsite concrete is in good agreement with the experimental results and has high accuracy. When the content of coal gangue ceramsite is 40%, the frost-resistance of concrete is the best, and the life of frost-resistance is the longest.
    邱繼生,王斌,關虓,等.凍融作用下煤矸石陶?;炷亮踊幝杉皦勖A測[J].混凝土與水泥制品,2019(11):61-65. QIU J S,WANG B,GUAN X,et al.Deterioration Rule and Life Prediction of the Coal Gangue Ceramsite Concrete under Freeze-thaw Cycles[J].China Concrete and Cement Products,2019(11):61-65.
    穩泡劑改善火山灰泡沫混凝土性能研究
    穩泡劑改善火山灰泡沫混凝土性能研究
    • 史星祥1,張磊蕾2,滿麗瑩1,田 寅1
    2019年第11期
    摘要
    引用本文
    摘 要:采用硬脂酸鈣和一種實驗室自制的外加劑作為穩泡劑,通過雙氧水化學發泡方法,制備了火山灰泡沫混凝土(VAFC)。研究了兩種穩泡劑單摻和復摻對VAFC成型狀態、干密度、抗壓強度、吸水率、導熱系數和孔結構的影響。試驗結果表明,硬質酸鈣可以作為穩泡劑改善孔結構提高抗壓強度,同時也具有很好的憎水效果,顯著降低吸水率;而使用自制穩泡劑時,對VAFC抗壓強度會產生負面影響,對吸水率改善效果一般。VAFC的孔結構影響材料的保溫性能,相近干密度情況下,氣孔孔徑越小,連通孔越少,導熱系數越低;使用自制穩泡劑制備的VAFC,孔徑在0.5~1 mm之間,氣孔呈球狀,連通孔很少,導熱系數較低;而使用硬脂酸鈣時,孔徑在1~2 mm之間,部分氣孔呈不規則狀,且存在少量連通孔,導熱系數相對較高。硬脂酸鈣和自制穩泡劑復合使用,可以達到協同增效的作用,使VAFC在力學性能和保溫性能兩個方面均達到較為理想的水平。 Volcanic ash foam concrete is prepared by hydrogen peroxide chemical foaming method using calcium stearate and an admixture produced in laboratory as foam stabilizer. The effects of two admixtures on forming state, dry density, compressive strength, water absorption rate, thermal conductivity and pore structure of VAFC are researched. The results show that taking as foam stabilizer, calcium stearate can not only improve the pore structure and compressive strength, but also have the hydrophobic effect which decreases the absorption ratio significantly. But the compressive strength of VAFC decreases and the hydrophobic effect is not that well when using self-made foam stabilizer. The pore structure of VAFC affects the thermal insulation performance. Under the condition of similar dry density, small pore size and few connecting holes in concrete results in low thermal conductivity. The pore size is at the range of 0.5~1 mm, the shape of the pores are circular, the connecting holes are few and the thermal conductivity is low when using the self-made foam stabilizer. In the otherwise, the pore size is at the range of 1~2 mm, the shape of the pores are irregular, the thermal conductivity are few and the heat conductivity coefficient is high when using calcium stearate. The combination of calcium stearate and self-made foam stabilizer can achieve synergistic effect, which makes the mechanical properties and thermal insulation properties of VAFC reach an ideal level.
    史星祥,張磊蕾,滿麗瑩,等.穩泡劑改善火山灰泡沫混凝土性能研究[J].混凝土與水泥制品,2019(11):57-60. SHI X X,ZHANG L L,MAN L Y,et al.Effect of Foam Stabilizer on Performance of Volcanic Ash Foam Concrete[J].China Concrete and Cement Products,2019(11):57-60.
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