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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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    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.
    污水浸泡環境下混凝土的微生物腐蝕影響研究
    污水浸泡環境下混凝土的微生物腐蝕影響研究
    • 榮 輝,高瑞曉,高禮雄,張 磊,張 穎,徐 蕊,王卓琳,殷昆鵬,何超旺
    2019年第1期
    摘要
    引用本文
    摘 要:通過對混凝土試件外觀形貌、質量、強度和礦物成分的演變規律分析,研究了污水浸泡環境下微生物對混凝土性能的影響。研究結果表明:當180 d時,對照組外觀形貌破壞較試驗組更加嚴重,質量損失率對照組大于試驗組,但抗壓強度兩組相近;造成對照組腐蝕的原因是酸與硫酸鈉晶體膨脹的共同作用,而導致試驗組腐蝕破壞的原因是鈣礬石和石膏的雙重膨脹破壞。 Abstract: The effects of microorganisms on the performance of concrete immersed in sewage is studied by the evolution of appearance, quality, strength and mineral composition of concrete specimen. The results show that the appearance damage of the control group is more serious than the experimental group at 180 d, the quality loss rate of the control group is larger than the test group, but the compressive strength of the two groups is similar. The cause of the corrosion of the control group is the joint effect of acid and sodium sulfate crystal expansion, and the cause of the corrosion failure of the test group is double expansion of alum and gypsum.
    榮輝,高瑞曉,高禮雄,等.污水浸泡環境下混凝土的微生物腐蝕影響研究[J].混凝土與水泥制品,2019(1):19-22. RONG H,GAO R X,GAO L X,et al.The Study on Microorganism Corrosion of the Concrete Immersed in Sewage[J].China Concrete and Cement Products,2019(1):19-22.
    多種摻合料顆粒群分布與水泥基復合體系強度關系研究
    多種摻合料顆粒群分布與水泥基復合體系強度關系研究
    • 張洪萍,白培康,王建弘,董彥莉
    2019年第1期
    摘要
    引用本文
    摘 要:利用磨細鋼渣粉替代礦渣,并摻以粉煤灰和硅灰,通過各成份之間合理的顆粒匹配達到固體的最密實狀態,以獲得高強的水泥基膠凝材料。依據粒度儀測出不同比例混合后混合材的顆粒群分布,通過MATLAB繪制出了滿足Dinger-Funk方程緊密堆積狀態下的顆粒群分布曲線,利用數值方法分析了混合料的顆粒群分布與Dinger-Funk方程顆粒群分布的擬合度,并測定了漿體的強度。試驗結果表明,混合摻合料的實際顆粒群分布與緊密堆積狀態顆粒群分布擬合度較高時,相應漿體的強度較高,可為配制高強的水泥基材料提供參考。 Abstract: The use of steel slag instead of slag powder in addition to fly ash and silica fume is proposed, the absolute densest solid state is achieved through particle matching between the various components of a mixture to achieve the highest density state. According to particle size distributions measured by granulometer, the actual particle size distribution curves based the Dinger–Funk equation of the closest-packing model with MATLAB are draw, and the fitting degrees of the particle size distribution of composite admixture between the actual situation and Dinger-Funk equation with MATLAB are calculated using the numerical method. The strength of neat paste is measured. The experimental results shows that the strength of neat paste is higher when the degrees of fitting are higher between the two particle size distributions. The numerical analysis method can provide the theoretical principle that can be scientifically applied to the preparation of high-performance cement-based cementitious material.
    張洪萍,白培康,王建弘,等.多種摻合料顆粒群分布與水泥基復合體系強度關系研究[J].混凝土與水泥制品,2019(1):23-25. ZHANG H P,BAI P K,WANG J H,et al.The Relationship Research on Particles Cradation of Admixtures and Strength of Multielement Composite Cement-based Materials[J].China Concrete and Cement Products,2019(1):23-25.
    一種有機外加劑對高含泥機制砂混凝土工作性及力學性能試驗研究
    一種有機外加劑對高含泥機制砂混凝土工作性及力學性能試驗研究
    • 鐘明云,范 志,李文科,賀 斌,瞿官偉,李 軍
    2019年第1期
    摘要
    引用本文
    摘 要:研究了一種有機外加劑對高含泥機制砂混凝土的工作性及力學性能的影響。試驗結果表明:提高減水劑中的保坍組分不能有效降低混凝土經時損失;提高緩凝組分有助于緩解混凝土經時損失,但其效果并不明顯,且會明顯增加混凝土凝結時間。通過摻入有機外加劑既可以顯著降低高含泥機制砂混凝土的經時損失,又可以提高混凝土28 d抗壓強度4%~10%,且對凝結時間影響較小,同時合理調整外加劑中的減水、保坍組分比例,更有利于發揮其作用效果。此外,該機制砂混凝土的耐久性還需進一步研究。 Abstract: The effect of an organic additive on the workability and mechanical properties of manufacture sand concrete with high clay content is mainly studied. The results show that the increase of water reducing agent cann’t effectively reduce concrete fluidity loss. The improvement of retarders is limited advantage to the workability of concrete, and it will obviously increase the setting time of the concrete. The addition of organic additive can not only significantly reduce the fluidity loss of concrete with high slag content of manufacture sand, but also increase the 28 d compressive strength of the concrete by 4%~10%, and has little effect on the setting time. At the same time, it is more beneficial to adjust the proportion of water reduction and slumping components in admixture. In addition, the durability of the mechanism of sand concrete with high content of clay needs further study.
    鐘明云,范志,李文科,等.一種有機外加劑對高含泥機制砂混凝土工作性及力學性能試驗研究[J].混凝土與水泥制品,2019(1):26-30. ZHONG M Y,FAN Z,LI W K,et al.Experimental Study of a Type of Organic Admixture on Workability and Mechanical Performance of Artificial Sand Concrete with High Clay[J].China Concrete and Cement Products,2019(1):26-30.
    水泥基透水路面制品的透水與保水性研究
    水泥基透水路面制品的透水與保水性研究
    • 唐江昱, 李 振,岳燕飛,王田堂,錢覺時
    2019年第1期
    摘要
    引用本文
    摘 要:通過討論影響水泥基透水路面制品透水性和保水性的主要因素,以及兩種性能之間的相互矛盾關系,指出水泥基透水制品對透水系數要求過高,而對保水性未充分重視。水泥基透水制品不僅應具有足夠的透水能力,還應有較高的保水能力,以滿足海綿城市建設更高的要求。采用粒徑盡可能小的單一粒級骨料制備水泥基透水路面制品,可以很好平衡透水性和保水性兩種指標的要求。 Abstract: By discussing the main factors that affect the water permeability and the water retention of cement-based permeable pavement products and the contradictory relationship between the two properties, the water permeability coefficient of the cement-based permeable products is required too high while enough attention is not given to the water retention performance. The cement-based permeable products should have both a sufficient water-permeable capacity and a high water-retaining capacity in order to meet the higher requirements of the construction of sponge city. The cement-based permeable pavement products, which are prepared by the single-grain aggregate at particle size as small as possible, which can well balance the requirements of both water permeability and water retention.
    唐江昱,李振,岳燕飛,等.水泥基透水路面制品的透水與保水性研究[J].混凝土與水泥制品,2019(1):31-35. TANG J Y,LI Z,YUE Y F,et al.Research on Permeability and Water Retention of Cement-based Permeable Pavement Products[J].China Concrete and Cement Products,2019(1):31-35.
    預應力鋼筒混凝土管(PCCP)幾種常用加固方法的對比研究
    預應力鋼筒混凝土管(PCCP)幾種常用加固方法的對比研究
    • 張海鵬,趙麗君,竇鐵生,程冰清
    2019年第1期
    摘要
    引用本文
    摘 要:預應力鋼筒混凝土管(PCCP)在設計制造、安裝施工以及外部環境等因素綜合作用下會出現砂漿保護層受損脫開、預應力鋼絲斷裂、混凝土管芯縱向開裂以及鋼筒泄漏等問題。為使管道恢復至原有承載能力,延長其使用壽命,消除安全隱患,需采用適當的方式對PCCP管進行修復加固。本文總結了常用的PCCP補強加固方法,并從內容、步驟、適用范圍、優缺點等多方面對各方法進行了對比,可為國內PCCP的補強加固提供參考。 Abstract: Considering combined effects of design, manufacture, installation, external environment and other factors, prestressed concrete cylinder pipe (PCCP) suffers from cracks and delamination of mortar coating, corrosion and fracture of prestressing wires, longitudinal cracks in core concrete and leakage of cylinders. In order to restore the pipeline to its original bearing capacity, prolong its service life and eliminate potential safety hazards, it is necessary to repair and strengthen the PCCP with broken wires in an appropriate manner. In this paper, the commonly used PCCP reinforcement methods, compares the methods from the aspects of content, steps, scope of application, advantages and disadvantages are summarized, which provides a better understanding of PCCP reinforcement methods for pipeline managers.
    張海鵬,趙麗君,竇鐵生,等.預應力鋼筒混凝土管(PCCP)幾種常用加固方法的對比研究[J].混凝土與水泥制品,2019(1):36-39. ZHANG H P,ZHAO L J,DOU T S,et al.Comparative Study on Reinforcement Methods of Prestressed Concrete Cylinder Pipe (PCCP)[J].China Concrete and Cement Products,2019(1):36-39.
    微彎弧形鋼筋混凝土構件裂縫計算方法研究
    微彎弧形鋼筋混凝土構件裂縫計算方法研究
    • 高 立
    2019年第1期
    摘要
    引用本文
    摘 要:水工大體積混凝土結構施工中常設寬槽以緩解溫度應力,為改進跨寬槽鋼筋的工作狀態,提出了一種微彎弧形跨寬槽鋼筋形式,能夠減小直鋼筋過縫的應力損失并提高施工效率。在弧形鋼筋混凝土板受彎試驗的基礎之上,研究了弧形鋼筋混凝土構件的裂縫計算方法。從單根微彎弧形鋼筋混凝土構件受拉分析入手,擴展到多根微彎弧形鋼筋混凝土構件受彎分析,最終得到裂縫間距及裂縫寬度的計算方法。 Abstract: In order to alleviate the temperature stress in the construction of large volume concrete structure of large volume, a kind of novel slightly bending rebars across the wide joint is proposed, which can reduce the stress loss of the straight rebars and improve the construction efficiency. On the basis of flexurd tests of bending rebars concrete slab, the crack calculation method of bending rebar concrete members is studied. From the analysis of the tensile analysis of novel slightly bending rebar concrete members, the flexural analysis of multiple novel slightly bending rebar concrete members is extended. Finally, the calculation method of crack spacing and crack width is obtained.
    高立.微彎弧形鋼筋混凝土構件裂縫計算方法研究[J].混凝土與水泥制品,2019(1):40-44. GAO L.Research on Crack Calculation Method of Slightly Bending Rebars Concrete Members[J].China Concrete and Cement Products,2019(1):40-44.
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