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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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    2019

    碳化與氯鹽共同作用下混凝土劣化的研究綜述
    碳化與氯鹽共同作用下混凝土劣化的研究綜述
    • 肖薇薇1,張紀剛1,2,張君博3,王鵬剛1,2,金祖權1,2,劉錦昆4
    2019年第12期
    摘要
    引用本文
    摘 要:碳化作用與高濃度氯離子侵蝕雙重作用下的混凝土結構更容易發生耐久性問題。通過分析碳化作用與氯離子侵蝕對混凝土的破壞機理,根據國內外學者對碳化與氯離子侵蝕共同作用下的相關研究,綜述了碳化與氯離子侵蝕共同作用下的相互影響及原因,并指出了未來試驗研究方向和建議。 Abstract: Based on the analysis of the damage mechanism of carbonation and chloride ion erosion on concrete, the research summarizes the interaction between carbonation and chloride ion erosion and the reasons, and points out the research directions and suggestions in the future.
    肖薇薇,張紀剛,張君博,等.碳化與氯鹽共同作用下混凝土劣化的研究綜述[J].混凝土與水泥制品,2019(12):24-28. XIAO W W,ZHANG J G,ZHANG J B,et al.Summary of the Research on Concrete Degradation under Combined Action of Carbonation and Chloride[J].China Concrete and Cement Products,2019(12):24-28.
    沖擊回波法評價混凝土質量研究綜述
    沖擊回波法評價混凝土質量研究綜述
    • 趙 祺1,桑 源1,高金麟1,楊英姿1,隋良志2,朱衛中1,3
    2019年第12期
    摘要
    引用本文
    摘 要:回顧了沖擊回波法在評價混凝土質量的研究現狀和主要應用,介紹了沖擊回波法的基本原理,分析了該方法在評價混凝土強度、檢測構件尺寸、缺陷以及評價混凝土耐久性方面的原理及應用,總結了該方法評價混凝土質量的優勢和不足,為今后該技術廣泛的工程應用提出了進一步的研究方向。 Abstract: This paper reviews the current situation and main application of impact-echo method in evaluating the quality of concrete. Firstly, the basic principle of impact-echo method is introduced. And then principles and applications are analyzed in evaluating concrete strength, detecting structure size and defects, as well as evaluating concrete durability. Meanwhile, the advantages and disadvantages of this method to assess concrete quality are summarized. Finally, further research directions are pointed out for the wide range of engineering applications of this novel technology in the future.
    低收縮高黏結黑色高性能混凝土的性能試驗研究
    低收縮高黏結黑色高性能混凝土的性能試驗研究
    • 夏中升1,2,沙建芳1,2,劉建忠1,2,郭 飛1,2,徐海源1,2
    2019年第12期
    摘要
    引用本文
    摘 要:研究了著色劑、外加劑摻量、配合比參數等對混凝土力學性能、水化產物形成、收縮變形性能、耐磨損能力的影響規律,再通過對既有混凝土界面進行不同的預處理方式,研究了界面粗糙度、干燥狀態等對新舊混凝土界面黏結性能的影響。結果表明:高摻量鐵黑降低混凝土力學性能,碳黑與鐵黑復配有助于提升力學性能;著色劑粒子的加入有助于氫氧化鈣的結晶形成,但對于鈣礬石影響較??;混凝土的耐磨損性能與水膠比、含氣量等試驗參數相關,降低漿體含氣量、選取合適的水膠比來獲得較高的基體強度,可提升混凝土的耐磨損性能。采用膠材水化溫升抑制和收縮補償復合技術,可實現混凝土分階段全過程收縮變形調控。較高的界面混凝土強度等級、較大的表面粗糙度以及表面預濕處理,有助于提高新舊混凝土界面黏結性能。 Abstract: The influence mechanism of colorants, admixtures and mix parameters on the surface color and workability of concrete, as well as its influence on the mechanical properties, shrinkage and deformation properties and wear resistance of concrete were studied. In addition, the influence of interface roughness and drying state on the bonding properties of new and old concrete interface was studied by different pretreatment methods of existing concrete interface. The results show that high content of iron black reduces the mechanical properties of concrete, and the combination of carbon black and iron black helps to improve the mechanical properties. The addition of colorant particles helps to form calcium hydroxide crystals, but has little effect on ettringite. The abrasion resistance of concrete is related to the test parameters such as water-binder ratio and air content. Reducing the air content of slurry and choosing appropriate water-binder ratio to obtain higher matrix strength can improve the abrasion resistance of concrete. By using hydration temperature rise inhibitor and high performance expansion agent, shrinkage suppression compensation can be realized in the whole stage. Higher strength grade of interfacial concrete, greater surface roughness and surface pre-wetting treatment are helpful to improve the interfacial bonding performance of new and old concrete.
    夏中升,沙建芳,劉建忠,等.低收縮高黏結黑色高性能混凝土的性能試驗研究[J].混凝土與水泥制品,2019(12):12-17. XIA Z S,SHA J F,LIU J Z,et al.Experimental Study on Performance of Low Shrinkage and High Bond Black High Performance Concrete[J].China Concrete and Cement Products,2019(12):12-17.
    預制混凝土箱涵結構設計理論與施工技術研究綜述
    預制混凝土箱涵結構設計理論與施工技術研究綜述
    • 何建平,蔡玉軍,孫建龍
    2019年第12期
    摘要
    引用本文
    摘 要:結合預制混凝土箱涵的設計理論和施工方法,深入分析了現有預制混凝土箱涵結構力學簡化計算方法、有限元數值模擬分析方法。系統論述了現澆法、直接頂進工法和管幕-箱涵法的研究概況、進展及其優勢進行了系統地論述與總結。并在此基礎上,提出了研究中存在的關鍵技術和具體問題,探討了預制混凝土箱涵結構的發展前景及趨勢。 Abstract: According to the design theory and construction method of underground precast concrete box culvert, two structural calculation methods, simplified calculation of structural mechanics and finite element numerical simulation, and several kinds of construction methods of box culvert are discussed, including cast-in-place method, jacking method and pipe-curtain-box culvert method et al. Combined with existing research, the research status and hot spots at home and abroad are analyzed systematically, summary have also been given in this paper. On this basis, some problems existing in the research are put forward, and the development prospect of underground box culvert is forecasted.
    何建平,蔡玉軍,孫建龍.預制混凝土箱涵結構設計理論與施工技術研究綜述[J].混凝土與水泥制品,2019(12):33-37+42. HE J P,CAI Y J,SUN J L.Summary of the Research on Design Theory and Construction Technology of Precast Concrete Box Culvert Structure[J].China Concrete and Cement Products,2019(12):33-37+42.
    蒸壓無石棉纖維水泥板鼓泡分層現象原因及解決措施
    蒸壓無石棉纖維水泥板鼓泡分層現象原因及解決措施
    • 徐定豐
    2019年第12期
    摘要
    引用本文
    摘 要:結合實際生產,分析了蒸壓無石棉纖維水泥板生產過程中鼓泡分層現象的原因,并結合實際生產,從提高坯料黏結力(優化原材料加工處理、回水回料控制、外加劑的應用、板材的壓制工藝、優化預養、蒸養制度等)和優化養護制度出發,提出了相應的解決措施,以期為蒸壓無石棉纖維水泥板的生產提供參考借鑒。 Abstract: Based on the actual production, the causes of the bubble and layering phenomenon in the production process of autoclaved asbestos-free fiber cement board were analyzed, and in combination with the actual production, in order to improve the bonding strength of the blank (optimize the processing and treatment of raw materials, return water and return material) Control, application of additives, pressing process, optimization of pre curing, steam curing system, etc.) and optimization of curing system, the corresponding solutions are put forward in order to provide a reference for the production of steam pressed asbestos-free fiber cement board.
    徐定豐.蒸壓無石棉纖維水泥板鼓泡分層現象原因及解決措施[J].混凝土與水泥制品,2019(12):38-42. XU D F.Causes and Solutions of the Bubbling and Delamination in Autoclaved Asbestos-Free Fiber Cement Board[J].China Concrete and Cement Products,2019(12):38-42.
    摻鎳鐵渣-礦渣復合微粉混凝土配合比設計
    摻鎳鐵渣-礦渣復合微粉混凝土配合比設計
    • 祁 皚,劉旭宏,楊綿越,李 征
    2019年第12期
    摘要
    引用本文
    摘 要:以配制強度等級為C30、C35,坍落度達100~140 mm的摻鎳鐵渣-礦渣復合微粉混凝土(鎳-礦混凝土)為例,進行了鎳-礦混凝土的配合比設計。首先,測定了鎳鐵渣-礦渣復合微粉摻量為10%~50%的復合水泥膠砂的28d抗壓強度,定義了不同復合微粉摻量下的復合水泥強度折減系數。然后,以普通混凝土配合比設計方法中的保羅米公式為基準,采用復合水泥強度折減系數對其進行修正,初步計算了復合微粉摻量為10%~50%的鎳-礦混凝土配合比。最后,經過試配和調整,配制出了滿足強度和坍落度要求的C30、C35鎳-礦混凝土,從而確定了最終配合比。試驗結果表明:對于鎳-礦混凝土,該配合比設計方法是可行的。 Abstract: Simply replacing cement with ferronickel slag powder of the equal mass is often adverse to maintaining the concrete strength. Therefore, mix design of concrete containing a compound admixture of ferronickel slag-slag micro (F-S) powder (referred as F-S concrete hereafter) was investigated. The target concrete strength grade was C30 and C35, and the specified slump was 100~140 mm. This mix design consisted of the following three steps. Firstly, according to the tested 28 d compressive strength of the composite cement mortar with F-S powder content ranging from 10% to 50%, the strength reduction factor of composite cement mortar with different F-S powder content was defined. Secondly, the preliminary mix proportions of F-S concrete were calculated by the modified Bolomy’s formula. Thirdly, after several rounds of trial and adjustment, the final mix proportions of the target C30 and C35 F-S concrete were determined. Results from the experimental tests confirm the applicability of the proposed method to design the mix proportions of F-S concrete.
    祁皚,劉旭宏,楊綿越,等.摻鎳鐵渣-礦渣復合微粉混凝土配合比設計[J].混凝土與水泥制品,2019(12):7-11. QI A,LIU X H,YANG M Y,et al.Mix Proportion Design of Concrete Containing Compound Admixture of Ferronickel Slag-slag Micro Powder[J].China Concrete and Cement Products,2019(12):7-11.
    硫酸鹽侵蝕混凝土力學性能及侵蝕產物研究進展
    硫酸鹽侵蝕混凝土力學性能及侵蝕產物研究進展
    • 李 濤,孫忠民,丁凱倫
    2019年1期 ?
    摘要
    引用本文
    摘要:大量新建混凝土建筑物和構筑物的出現使得混凝土耐久性問題受到格外關注,其中硫酸鹽侵蝕是引起混凝土結構過早破壞的四大主因之一。針對侵蝕產物濃度研究成為耐久性研究新的技術領域,本文系統總結了國內外關于硫酸鹽侵蝕后混凝土的力學性能劣化規律及鈣礬石、二水石膏等膨脹性產物的定性、定量分析研究現狀,指出了研究中存在的問題。并且針對分析中發現的不足,為今后的研究提出了建議。
    Abstract:The emergence of a large number of new concrete buildings and structures has caused special attention to the durability of concrete. Among them, sulfate erosion is one of the four main causes of premature failure of concrete structure, and the concentration of erosion products becomes a new idea for durability research. Here, the deterioration law of mechanical properties of concrete after sulfate erosion and the research status of qualitative and quantitative analysis of expansion products such as ettringite and gypsum are systematically summarized. The existing problems are pointed out. In view of the deficiencies found in the analysis, some suggestions are proposed for future research.
    李濤,孫忠民,丁凱倫.硫酸鹽侵蝕混凝土力學性能及侵蝕產物研究進展[J].混凝土與水泥制品,2019(1):1-5.
    LI T,SUN Z M,DING K L.Research Progress on Mechanical Properties and Corrosion Products of Concrete under Sulfate Attack[J].China Concrete and Cement Products,2019(1):1-5.
    珊瑚骨料與天然火山渣混凝土的配制及性能研究
    珊瑚骨料與天然火山渣混凝土的配制及性能研究
    • 王 晶,周永祥,冷發光,宋普濤,夏京亮,周 文,黎蔚詩
    2019年1期 ?
    摘要
    引用本文
    摘要:分別采用天然火山渣和珊瑚骨料配制輕骨料混凝土,研究了骨料預濕處理對天然火山渣混凝土和珊瑚骨料混凝土拌合物性能、抗壓強度的影響,并對比研究了LC50天然火山渣和珊瑚骨料與同強度等級C50石灰石混凝土的抗氯離子滲透性能和早期收縮性能。試驗結果表明,骨料預濕拌制工藝對于混凝土后期強度增長作用明顯;天然火山渣與珊瑚骨料混凝土的抗氯離子滲透性能比普通混凝土差,而天然火山渣和珊瑚骨料都能有效抑制混凝土的早期收縮,3 d的收縮率不到普通混凝土的一半。
    Abstract:Lightweight aggregate concrete is prepared with scoria aggregate and coral aggregate separately. The workability and compressive strength of the two kinds of lightweight aggregat concrete are studied between lightweight aggregate concrete prepared with prewet aggregate and not prewet aggregate, and chloride permeability and shrinkage at early age are comparative studied between LC50 prepared with scoria aggregate and coral aggregate and C50 concrete prepared with limestone aggregate. The results show that, the long term strength of lightweight aggregate concrete increase significantly with prewet aggregate. Chloride permeability of LC50 concrete prepared with scoria aggregate and coral aggregate is worse than that of C50 concrete prepared with limestone aggregate, but shrinkage at early age is less than half that of C50 concrete.
    王晶,周永祥,冷發光,等.珊瑚骨料與天然火山渣混凝土的配制及性能研究[J].混凝土與水泥制品,2019(1):6-9.
    WANG J,ZHOU Y X,LENG F G,et al.Preparation and Performance Study on Concrete with Coral Aggregate and Scoria Aggregate[J].China Concrete and Cement Products,2019(1):6-9.
    原生混凝土強度對再生混凝土力學性能及界面區微結構的影響
    原生混凝土強度對再生混凝土力學性能及界面區微結構的影響
    • 王繼娜,徐開東,李志新,馬先偉,牛季收,楊 歡,金 彪
    2019年1期 ?
    摘要
    引用本文
    摘要:為了改善再生骨料混凝土的性能,研究了原生混凝土強度對再生混凝土力學性能及界面區微結構的影響,并對比分析了相同強度等級和水灰比情況下普通混凝土和再生混凝土的力學性能和界面區微觀形貌。結果表明:強度等級相同時,為了達到與普通混凝土相同的流動度,再生混凝土中除了加入一定量的附加水之外,還需要加入一定量的水泥漿,且隨著原生混凝土強度的增加,水泥漿的加入量逐漸增加;在側向無限制受壓破壞時,再生混凝土與普通混凝土破壞形式基本相同,且原生混凝土強度對再生混凝土的破壞形式影響不大;強度等級相同時,再生混凝土的28d抗壓強度高于普通混凝土,且隨著原生混凝土強度的增加,早期強度逐漸降低,28d強度逐漸增大;水灰比相同時,普通混凝土各個齡期的抗壓強度均高于再生混凝土。?Abstract:?Inordertoimprovethepropertiesofrecycledconcrete,theeffectoforiginalconcretestrengthonthemechanicalpropertyandinterfacemicro-structureofrecycledaggregateconcretewerestudied.AndthepropertiesaboveofrecycledconcretewerecomparedwiththatofcommonconcreteunderthesameofstrengthgradeandW/C.Theresultsshowthatacertainamountofadditionalwaterandcementpasteshouldbeaddedtorecycledconcreteinordertoachievethesamefluiditywiththecommonconcreteundersamestrengthgrade.Andtheadditionalquantityofcementpasteincreasesaswellastheoriginalconcretestrengthincrease.Whentheconcreteisdamagedunderpressureandthelateralnolimit,thefailuremodeofrecycledconcreteisalmostthesameasthecommonconcrete.Andtheeffectoforiginalconcretestrengthonthefailuremodeofrecycledconcreteissmall.The28daycompressionstrengthofrecycledconcreteishigherthanthatofcommonconcreteundersamestrengthgrade.Earlystrengthdecreasesand28daycompressionstrengthincreasesastheoriginalconcretestrengthincrease.ThecompressionstrengthofeachageofcommonconcreteishigherthanthatofrecycledconcreteunderthesameW/C.
    王繼娜,徐開東,李志新,等.原生混凝土強度對再生混凝土力學性能及界面區微結構的影響[J].混凝土與水泥制品,2019(1):10-14.
    WANG J N,XU K D,LI Z X,et al.The Influence of Original Concrete Strength on Mechanical Properties and Interface Micro-structure of Recycled Aggregate Concrete[J].China Concrete and Cement Products,2019(1):10-14.
    鋰渣混凝土在酸雨腐蝕作用下的耐久性研究
    鋰渣混凝土在酸雨腐蝕作用下的耐久性研究
    • 王貴忠,張效忠
    2019年1期 ?
    摘要
    引用本文
    摘要:為了研究酸雨腐蝕對鋰渣混凝土耐久性的影響,試驗比較分析了不同鋰渣含量的鋰渣混凝土抗酸雨腐蝕能力?;赟EM結果對酸雨侵蝕作用下鋰渣混凝土的損傷進行細觀分析,并探究其腐蝕機理。研究結果表明,鋰渣混凝土具有較好的抗腐蝕性,可以應用到酸雨腐蝕地區。
    Abstract:In order to study the influence of acid rain corrosion on the durability of lithium slag concrete, the corrosion resistance of lithium slag concrete with different contents of lithium slag was compared and analyzed. Based on SEM results, the internal damage of lithium slag concrete under acid rain erosion was analyzed, and the corrosion mechanism was explored. The study shows that lithium slag concrete has good corrosion resistance and can be applied to acid rain corrosion area.
    王貴忠,張效忠.鋰渣混凝土在酸雨腐蝕作用下的耐久性研究[J].混凝土與水泥制品,2019(1):15-18. WANG Gui-zhong, ZHANG Xiao-zhong. The Research on Durability of Lithium Slag Concrete under Acid Rain Corrosion[J].China Concrete and Cement Products,2019(1):15-18.
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