第十期_2011_《混凝土與水泥制品》雜志社

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第十期

高速鐵路混凝土結構硅烷浸漬防腐蝕措施技術要求的研究

李化建1,2，易忠來1,2，謝永江1,2

２０11年第10期

摘要

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摘要：總結分析了國內外關于混凝土結構硅烷浸漬防腐蝕措施技術要求的差異，指出了我國硅烷浸漬防腐蝕措施技術要求所存在的問題。根據我國高速鐵路作用環境的特征，提出了硅烷浸漬防腐蝕措施的功能定位，在系統研究硅烷浸漬材料、硅烷浸漬混凝土以及硅烷浸漬實體結構防護效果的基礎上，提出了適用于我國高速鐵路的混凝土結構硅烷浸漬防腐蝕措施技術要求。 Abstract: Technical requirements for silane impregnating surface treatment technology at home and abroad are summarized. The problems of silane impregnating surface treatment technology in China have been put forward. According to the environmental characteristics of high speed railway in China, the function orientation of the silane impregnating surface treatment technology is presented. Based on the system research of silane impregants performance, the protection effect of concrete cubes and field structures treated with silane impregants, the technical requirements for silane impregnating surface treatment technology fit for high speed railway concrete structures of China have been put forward.

聚羧酸減水劑的溫度依賴性

吳華明1,2，薛永宏1,2，林宗良1,2，周棟梁1,2

２０11年第10期

摘要

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摘要：在三個溫度(5℃、20℃、30℃)條件下，采用凈漿流動度和總有機碳分析儀測量有機碳的方法評價了兩種具有不同接枝方式的聚羧酸減水劑(P-酯減水劑和P-醚減水劑)在水泥體系中的分散性能和吸附性能，并系統討論了吸附量與分散性能之間的關系。試驗結果表明：P-酯減水劑的初始分散性能受溫度的影響較大，P-醚減水劑的持續分散能力與溫度有較大的依賴性；P-醚減水劑的吸附總量小于P-酯減水劑，但具有更好的吸附穩定性；在吸附量對分散能力的貢獻率方面，P-醚減水劑具有更大的優勢。 Abstract: Under the different temperature conditions(5℃,20℃,30℃), the dispersion ability and adsorption property of two kinds of polycarboxylic acid superplasticizer with different grafting modes (P-ester and P-ether superplasticizers) are evaluated by cement paste fluidity and measuring organic carbon by total organic carbon analyzer. The relationship between adsorption amount and dispersion ability is systematically discussed. The experimental results show that the original dispersion ability of P-ester superplasticizer is affected larger by temperature, and the sustainable dispersion ability of P-ether superplasticizer has higher dependence with the temperature. The total adsorption amount of P-ether superplasticizer is smaller than that of P-ester superplasticizer, but P-ether superplasticizer has better adsorption stability. P-ether superplasticizer has better contribution on the effect of adsorption amount on the dispersion ability.

硅酸鹽水泥-鋁酸鹽水泥-硬石膏體系的干縮變形性能研究

張承志1，李海南1，王愛勤2，張彥敏1

２０11年第10期

摘要

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摘要：研究了不同預養護時間下硅酸鹽水泥-鋁酸鹽水泥-硬石膏三元體系的干縮變形行為和失水情況。研究發現，單摻鋁酸鹽水泥或硬石膏時，隨著摻量的增加，硬化水泥石的干縮變形增大；同時摻入鋁酸鹽水泥和硬石膏時，會彼此減弱體系干縮變形的能力，并通過微觀性能試驗對其進行了機理分析。 Abstract: The dry shrinkage and dehydration of ternary system of portland cement-alumina cement-gypsum under different pre-curing ages are studied. The research shows that the dry shrinkage of hardened cement stone will increase while increasing the mixing amount of either alumina cement or gypsum. While mixed with both alumina cement and gypsum, the ability of dry shrinkage will be decreased by each other. And the mechanism analysis on the ternary system is carried out by micro-performances experiment.

環保型植生多孔混凝土試驗研究

楊加1，周錫玲2,3，張勝4，楊軍1

２０11年第10期

摘要

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摘要：以正交試驗設計原理為基礎，對影響多孔混凝土植生性能的灰集比、水灰比和摻合料進行試驗研究，并進行了配合比優化設計。結果表明：多孔混凝土總孔隙率與連通孔隙率表現出良好的線性相關性，而孔隙率與抗壓強度間不存在良好的線性比例關系。摻合料對多孔混凝土pH值的影響次序為: 單摻45%粉煤灰＞摻粉煤灰和礦渣微粉各22.5%+5%硅灰＞摻粉煤灰和礦渣微粉各22.5%＞單摻45%礦渣微粉＞單摻5%硅灰；對孔隙率與28d抗壓強度的影響次序為: 單摻45%粉煤灰＜單摻45%礦渣微粉＜單摻5%硅灰＜摻粉煤灰和礦渣微粉各22.5%＜摻粉煤灰和礦渣微粉各22.5%+5%硅灰。綜合考慮多孔混凝土的植生性能，本試驗范圍內的最優配合比為:灰集比1：9，水灰比38%，雙摻粉煤灰和礦渣微粉各22.5%。 Abstract: Based on the principle of the orthogonal design, the influences of cement-aggregate ratio, water-cement ratio and admixtures on the performances of porous concrete for plant-growing are studied, and the design of the optimum mix proportion is carried out. The results indicate that there is a good linearly proportional relationship between the total porosity and connected porosity of porous concrete, but not between the porosity and compressive strength. The effective order of admixtures on pH of porous concrete is as following: 45% fly ash＞22.5% fly ash, 22.5% slag powder and 5% silica fume＞22.5% fly ash and 22.5% slag powder＞45% slag powder＞5% silica fume. The effective order of admixtures on porosity and compressive strength of porous concrete is as following: 45% fly ash＜45% slag powder＜5% silica fume＜22.5% fly ash and 22.5% slag powder＜22.5% fly ash, 22.5% slag powder and 5% silica fume. According to comprehensive consideration on the performances of porous concrete for plant-growing, when the cement-aggregate ratio is 1:9, water-cement ratio is 38%, combined mixture of fly ash and slag powder is both 22.5%, the mix proportion within the range of this experiment is best.

煅燒制度對煤矸石活化性能的影響

宋旭艷，韓靜云，郜志海

２０11年第10期

摘要

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摘要：以江蘇宜興產煤矸石為研究對象，對其基本物性進行分析可知，煤矸石的礦物組分以高嶺石和石英為主。將煤矸石于不同煅燒溫度和不同保溫時間下進行活化，利用X射線衍射分析（XRD）和力學強度試驗對其活化過程進行研究。結果顯示，隨著煅燒溫度和保溫時間的增加，高嶺石的分解趨于完全，活化煤矸石水泥強度增加；但煅燒溫度過高、保溫時間過長，無定形礦物會向穩定狀態轉變，活性降低。煅燒溫度為750℃、保溫4h時煅燒煤矸石的活化性能較好。 Abstract: Taking the coal gangue from Jiangsu Yixing as research object, from the basic performance analysis on it, it shows that the coal gangue’s mineral compositions are chiefly kaolinite and quartz. Coal gangue can be activated at different calcination temperature and different holding time. The activation process is studied by using X-ray diffraction(XRD) analysis and mechanical strength test. The results show that with increasing of calcination temperature and holding time, the decomposition of kaolinite tends to be complete and the strength of activated coal gangue cement is improved. However, when calcination temperature is too high and holding time is too long, the structure of amorphous minerals turns into steady state and its activity is reduced. The activation performance of coal gangue can be better when it is calcined at 750℃ and hold for 4 hours.

無粘結預應力混凝土管產品特點及工程應用

談永泉1，陳立喜2，付水奇3，劉汴生4

２０11年第10期

摘要

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摘要：無粘結預應力混凝土管是國內近幾年發展起來的新型管道材料，它是采用單根錨張的無粘結預應力鋼絞線技術設計制作的。該產品以大口徑為主，已在廣東惠州市大亞灣引水工程中大量使用，運營7年來管線正常。本文對無粘結預應力混凝土管產品及其生產、產品標準及工程應用情況進行了介紹。 Abstract: No-bonding prestressed concrete pipes are a new kind of pipes in recent years in China, which are made by the technology of no-bonding prestressed steel strand with single anchor-tension. No-bonding prestressed concrete pipes are mainly large diameter pipes, which have been greatly applied in Daya Bay water diversion project in Huizhou, Guangdong Province, and the pipe line has been operated normally for 7 years. In this paper, the production and producing process of no-bonding prestressed concrete pipes, its production standards and engineering application are introduced.

管樁生產中石灰石集料對混凝土強度的影響

蔣元海，董沛善

２０11年第10期

摘要

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摘要：采用石質為石灰石與石質為硅質巖的兩種不同粗集料拌制混凝土，經過常壓養護、壓蒸養護等不同的混凝土蒸汽養護工藝，測定混凝土脫?？箟簭姸燃皦赫艉罂箟簭姸?。結果表明：石質為石灰石與石質為花崗巖的兩種不同粗集料在常壓養護結束后，混凝土抗壓強度均有較大的增長，混凝土強度增長規律基本一致；但經壓蒸養護后石質為石灰石與石質為花崗巖的兩種不同粗集料配制的混凝土抗壓強度產生很大的差異，石質為石灰石的粗集料配制的混凝土強度增長較低，而石質為硅質巖的粗集料配制的混凝土強度有很大的提高。 Abstract: Taking the limestone and siliceous rocks as coarse aggregates to mix concrete, through atmospheric curing and autoclave curing, the concrete compressive strength after demould and compressive strength after autoclave curing are tested. The results indicate that the concrete compressive strength increases obviously after atmospheric curing when taking the limestone and granite as coarse aggregates, and the strength increasing laws are basically in accordance. However, the concrete compressive strength is great different after autoclave curing when taking the limestone and granite as coarse aggregates, the concrete strength increases lower with limestone as coarse aggregate, but the concrete strength increases higher with siliceous rocks as coarse aggregate.

摻減水劑對混凝土電桿質量及生產成本影響的分析

周萬軍

２０11年第10期

摘要

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摘要：在配制混凝土時摻入合適的減水劑是改善混凝土性能、提高混凝土強度行之有效的措施,也是節省能源、節約水泥的重要途徑。本文就混凝土電桿生產中使用減水劑對其質量及成本的影響及減水劑使用中應注意的事項進行了分析探討。 Abstract: Adding suitable water reducers is an effective way to improve the properties and strength of concrete when preparing the concrete, and it can also save the energy and cement. The effects of water reducers on the quality and cost in the process of concrete pole production and the precautions for using water reducers are analyzed and discussed.

礦物摻合料與纖維雙摻對混凝土抗滲性能的影響及工程應用

錢紅萍，李書進

２０11年第10期

摘要

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摘要：采用RCM氯離子擴散系數法和滲水高度法，研究了粉煤灰、礦粉、PVA纖維、纖維素纖維的摻入對混凝土抗滲性能的影響。試驗結果表明，粉煤灰和礦粉的摻入能有效降低混凝土中氯離子擴散系數和滲水高度。在摻加礦物摻合料的基礎上再摻入纖維混凝土的抗滲性能進一步提高，雙摻對混凝土抗滲性能提高的復合效應明顯。 Abstract: The influences of fly ash, slag, PVA fiber and cellulose fiber on the penetration resistance of chloride ions into concrete are studied, through using the chloride ions diffusion coefficient test method （RCM） and depth of water penetration test method. The experimental results show that the addition of fly ash and slag can effectively reduce the chloride ion diffusion coefficient in concrete and water seepage height. Mineral admixture concrete mixed with fibers can further improve the impermeability of concrete, and combined admixtures of mineral admixtures and fiber can obviously improve the impermeability of concrete.

纖維水泥板和硅鈣板生產線主機設備安裝方案優化探討

王平，秦賀勝

２０11年第10期

摘要

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摘要：介紹了纖維水泥板和硅酸鈣板生產線主機設備安裝的重點，按照纖維水泥板和硅酸鈣板產品特點，力求在安裝階段就按照正確的方式進行，減少因安裝誤差過大造成的返工及廢料損失，規范纖維水泥板和硅酸鈣板行業主機設備安裝程序。 Abstract: The key points of the host equipment installation for fiber cement plates and silicate calcium plates production line are introduced. According to the production characteristics of fiber cement plates and silicate calcium plates, the correct manner should be carried out during the installation phase, which can reduce the rework and waste loss because of the too larger installation errors, and regulate the host equipment installation process for fiber cement plates and silicate calcium plates industry.

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