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    蘇州混凝土水泥制品研究院有限公司

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    第九期

    礦物摻合料對透水混凝土性能的影響
    礦物摻合料對透水混凝土性能的影響
    • 周 璐1,2,范宗青1,2,安生霞1,2,馬繼財1,2,左 鵬1,2,金長婷1,2,周 陽1,2,劉成奎1,2
    2018年第9期
    摘要
    引用本文
    摘 要:研究了粉煤灰、礦粉和硅灰對透水混凝土力學性能、滲透性能和抗凍性能的影響。結果表明:粉煤灰具有的“形態效應”和“微集料效應”,可以有效改善透水混凝土的工作性能,提高透水混凝土的致密度,從而改善透水混凝土的力學性能、滲透性能和抗凍性能;礦粉可以顯著提高透水混凝土的力學性能、滲透性能和抗凍性能,當礦粉摻量小于15%時,提高礦粉摻量可以有效提高透水混凝土的綜合性能;硅灰能夠大幅度提高透水混凝土的力學性能和抗凍性能,對滲透性能也有一定程度的改善,但提高硅灰摻量對提高透水混凝土力學性能和抗凍性能作用有限,且摻量過高時會對透水混凝土的滲透性能有一定影響。 Abstract: The mechanical property, permeability and frost resistance of pervious concrete with fly ash, slag, and silica fume were investigated. The results show the morpha effect and micro aggregate effect of the fly ash can improve working performance and density of pervious concrete, then contribute to the mechanical property, permeability and frost resistance. Slag can significantly improve the mechanical property, permeability and frost resistance of pervious concrete, when content of slag is less than 15%, increasing content of slag can also improve the properties of pervious concrete. The mechanical property and frost resistance of pervious concrete is drastically improved, the permeability is partly aslo improved, but the admixture has no significant effect on the mechanical property and frost resistance, and the permeability is decreased when the content of silica fume is too high.
    周璐,范宗青,安生霞,等.礦物摻合料對透水混凝土性能的影響[J].混凝土與水泥制品,2018(9):1-5. ZHOU L,FAN Z Q,AN S X,et al.The Influence of Mineral Admixtures on the Properties of Pervious Concrete[J].China Concrete and Cement Products,2018(9):1-5.
    SAP與硅灰復摻對水泥強度與電阻率的影響
    SAP與硅灰復摻對水泥強度與電阻率的影響
    • 鞠家佳,廖宜順,陳 磊,秦 勇
    2018年第9期
    摘要
    引用本文
    摘 要:研究了高吸水樹脂(SAP)和硅灰復摻對水泥漿體凝結時間、抗壓強度、電阻率和溫度等的影響。結果表明:SAP的摻入降低了試塊的抗壓強度,SAP摻量為0.4%時,隨著硅灰摻量的增大,硬化水泥漿體的3 d抗壓強度逐漸降低,但28 d抗壓強度逐漸增大;SAP能延長水泥漿體的凝結時間,硅灰則縮短水泥漿體的凝結時間;不同摻量SAP和硅灰的水泥漿體電阻率變化曲線具有相同的變化趨勢,SAP能明顯降低水泥漿體12 h齡期后的電阻率,而硅灰能降低水泥漿體24 h齡期后的電阻率;隨著SAP摻量的增加,水泥漿體內部溫度峰值逐漸降低,而隨著硅灰摻量的增加,水泥漿體內部溫度峰值先增加后降低。 Abstract:The effects of super absorbent polymer (SAP) and silica fume on the setting time, compressive strength, electrical resistivity and temperature of cement paste were studied. The results show that the SAP reduces the compressive strength of the cement pastes, when the content of SAP is 0.4%, the 3 d compressive strength of hardened cement paste decreases gradually with the increase of silica fume, but the compressive strength of 28 d gradually increases. SAP can extend the setting time of the cement paste, but the silica fume can shorten the setting time of the cement paste. The electrical resistivity of cement paste with different SAP and silica fume content have the same trend with time, SAP can obviously reduce the electrical resistivity of cement paste after 12 h, the silica fume can reduce the electrical resistivity after 24 h. The maximum temperature inside the cement paste gradually decreases with the increase of the content of SAP, and which increases first and then decreases with the increase of silica fume content.
    基于電化學腐蝕的橋梁鋼筋混凝土耐腐蝕性試驗研究
    基于電化學腐蝕的橋梁鋼筋混凝土耐腐蝕性試驗研究
    • 何 勇,唐先習,孫拴虎,張景偉
    2018年第9期
    摘要
    引用本文
    摘 要:針對沿海地區以及冬季除冰鹽大量使用所造成的氯鹽腐蝕橋梁的情況,以沿海滬通鐵路工程為依托,使用施工現場的鋼筋、水泥等原材料,制作三組鋼筋混凝土試件,將其分別浸泡在摩爾質量分數為1 mol/L、2 mol/L和3.5 mol/L的氯化鈉溶液中,利用電化學方法在不同時間點測出溶液中鋼筋混凝土試件中鋼筋的腐蝕極化曲線,然后再使用塔菲爾外推法對測出的數據進行擬合計算得到腐蝕電位、腐蝕電流密度和腐蝕速率值,最后利用上述三種腐蝕狀態的評價指標對比分析浸泡在不同氯離子含量溶液中鋼筋混凝土的腐蝕狀況。結果表明,氯化鈉對混凝土中鋼筋的腐蝕明顯,基本呈現出腐蝕速度先逐漸加快后減弱最后再加速的趨勢;隨著溶液中氯離子含量的增加,鋼筋混凝土中鋼筋的腐蝕量增大,鋼筋的整體腐蝕速度也越快,且在中前期腐蝕速度減弱的現象也越明顯。 Abstract:In view of the situation of the chlorine salt corrosion bridge caused by the heavy use of deicing salt in winter and coastal chloride environment, on the basis of HuTong Railway Project, 3 groups of reinforced concrete specimens were made in the experiment by using the steel, cement and other raw materials at the construction site. Then, they were soaked in sodium chloride solutions of 1 mol/L, 2 mol/L, and 3.5 mol/L, respectively, and the polarization curves of reinforced concrete in solution at different time points were measured by electrochemical methods. In addition, Tafel extrapolation, a nonlinear least-squares method, was used to fit the measured data. The corrosion potential, corrosion current density, and corrosion rate were calculated from the software included in the electrochemical workstation. Finally, the corrosion status of reinforced concrete soaked in different concentrations of sodium chloride solution were compared and analyzed using the above three evaluation indicators of corrosion status. The results show that the sodium chloride solution can significantly corrode steel in concrete, and the corrosion law basically shows that the corrosion rate in the early period is gradually increasing, then weakened, and then accelerated; The more concentrated the concentration of sodium chloride solution, the greater the amount of corrosion of steel bars in reinforced concrete, the faster the corrosion rate, and the phenomenon of weakening corrosion at early and middle stages is more obvious.
    何勇,唐先習,孫拴虎,等.基于電化學腐蝕的橋梁鋼筋混凝土耐腐蝕性試驗研究[J].混凝土與水泥制品,2018(9):10-15. HE Y,TANG X X,SUN S H,et al.Experimental Research on Corrosion Resistance of Bridge Reinforced Concrete Based on Electrochemical Corrosion[J].China Concrete and Cement Products,2018(9):10-15.
    礦物摻合料對混凝土早期收縮及開裂性能的影響
    礦物摻合料對混凝土早期收縮及開裂性能的影響
    • 張 駿1,田 帥2,3,梁麗敏2,3,黑金龍2,楊 鑫2
    2018年第9期
    摘要
    引用本文
    摘??要:采用CABR-NES非接觸式收縮變形測定儀及平板刀口約束收縮法,研究了粉煤灰、礦渣粉摻量對混凝土早期收縮與開裂性能的影響。結果表明,在相同水膠比下,采用等量的粉煤灰或礦渣粉取代水泥對混凝土的早期收縮及開裂性能均有一定的改善作用,粉煤灰對混凝土開裂的抑制效果優于礦渣粉。當粉煤灰和礦渣粉摻量分別為30%和10%時,混凝土具有最小的收縮率、開裂面積及較小的最大裂縫寬度?;炷恋氖湛s與開裂存在較好的相關性,混凝土的早期開裂主要與其早期收縮有關,當摻入粉煤灰或礦渣粉的混凝土收縮量較小時,混凝土單位面積上的總開裂面積則相對較小。Abstract:CABR-NESnon-contactshrinkagedeformationtesterandflatblade-edgeshrinkagemethodwereusedtostudytheeffectofflyashandslagpowderontheearly-ageshrinkageandcrackingperformanceofhighperformanceconcrete.Theresultsindicatethatthereplacementofcementwiththesameamountofflyashorslagpowderatthesamewater-binderratiocanimprovetheearly-ageshrinkageandcrackingperformanceofconcrete.Theeffectofflyashonconcretecrackingisbetterthanthatofconcreteslagpowder.Whenthecontentofflyashandslagpowderare30%and10%,respectively,theconcretehasthesmallestshrinkageandcrackingarea.Inaddition,thereisagoodcorrelationbetweenshrinkageandcrackingofconcrete.Whenconcretecontainingflyashorslagpowderhassmallshrinkage,thetotalcrackingareaperunitareaofconcreteisrelativelysmall.Comparedwiththeslagpowder,theflyashhasabetterinhibitioneffectontheconcretecracking.
    張駿,田帥,梁麗敏,等.礦物摻合料對混凝土早期收縮及開裂性能的影響[J].混凝土與水泥制品,2018(9):16-19. ZHANG J,TIAN S,LIANG L M,et al.The Influence of Mineral Admixtures on Early-age Shrinkage and Cracking of Concrete[J].China Concrete and Cement Products,2018(9):16-19.
    濕熱條件下鏡面水泥基材料光澤度保持工藝研究
    濕熱條件下鏡面水泥基材料光澤度保持工藝研究
    • 陳 旭1,2,陳天藝3,張建業2
    2018年第9期
    摘要
    引用本文
    摘?要:鏡面水泥基材料服役期間的水化和表面物質遷移可能會對其光澤度產生影響。針對這一問題,試驗設計了不同條件下的濕熱處理制度進行模擬。結果表明,濕熱環境會導致鏡面板光澤度值大幅度下降。而干熱處理、貼膜、涂刷有機硅防水劑等方式也并不能有效阻礙該類下降。但將干熱處理與涂刷硅油工藝復合后,鏡面板經水熱處理后的光澤度值可以達到60以上。經過多次干熱、水熱循環試驗驗證,該復合工藝具有良好的長期光澤度保持作用。Abstract:Hydrationandmicro-materialmigrationofcement-basedmaterialscouldcausethechangeofglossinessofmirrorplate.Approachingtothisissue,differentheat-moisturetreatmentsformirrorplatearedesignedtolab-scalesimulation.Theexperimentalresultsindicatethatheat-moisturetreatmentscauseasharpdropofmirrorplateglossiness,whichcouldnotbepreventedbydryheatcuring,filmingandbrushingorganosiliconwater-proofingagent.Butcompositeprocessconsistingofdryheatcuringandbrushingorganosiliconwater-proofingagentcouldkeepglossinessvalueofmirrorplateabove60.Andthedurableglossinessofmirrorplateisverifiedbythecyclingtestofdryheatandhydrothermaltreatments.
    陳旭,陳天藝,張建業.濕熱條件下鏡面水泥基材料光澤度保持工藝研究[J].混凝土與水泥制品,2018(9):20-23. CHEN X,CHEN T Y,ZHANG J Y.Process Study of Durable Glossiness of Mirror Plate Making of Cementbased Materials on Hygrothermal Conditions[J].China Concrete and Cement Products,2018(9):20-23.
    材料組成對水泥混凝土早期塑性開裂的影響
    材料組成對水泥混凝土早期塑性開裂的影響
    • 葉嘉誠1,劉宇彬1,徐志強1,周 鯤1,姚佳良2,馮新軍2
    2018年第9期
    摘要
    引用本文
    摘 要:針對目前路面水泥混凝土早期塑性開裂嚴重的現象,參考日本笠井芳夫教授提出的混凝土平板試件抗裂性試驗方法,自行研制了試驗模具,并研究了水膠比、水泥漿體積含量、粉煤灰摻量和減水劑摻量對路面混凝土早期塑性開裂的影響。結果表明,當混凝土的水膠比為0.38~0.40、水泥漿體積含量為26%及粉煤灰摻量為10%時,混凝土具有最高的抵抗早期塑性收縮開裂的能力,但該能力隨高效減水劑摻量的增大而下降。Abstract: Aiming at the phenomenon of serious early plastic cracking of pavement concrete at present, based on the test method of crack resistance of concrete slab specimen proposed by Prof. Kasai of Japan, self-developed test mold was used to study the ratio of W/B, the volume content of cement slurry, the content of fly ash and the superplasticizer influence of volume on early plastic cracking of pavement concrete. The results show that the concrete has the highest resistance to early plastic shrinkage cracking when W/B of the concrete ranges from 0.38 to 0.40, the cement slurry volume content is 26%, and the fly ash content is 10%. The ability of the concrete to resist early plastic shrinkage and cracking is declining with increasing high-efficiency water-reducing agent content.
    葉嘉誠,劉宇彬,徐志強,等.材料組成對水泥混凝土早期塑性開裂的影響[J].混凝土與水泥制品,2018(9):24-27. YE J C,LIU Y B,XU Z Q,et al.The Effects of Materials Composition on Early Plastic Cracking of Cement Concrete[J].China Concrete and Cement Products,2018(9):24-27.
    聚合物膠粉摻量對硫鋁酸鹽水泥砂漿性能 影響研究
    聚合物膠粉摻量對硫鋁酸鹽水泥砂漿性能 影響研究
    • 康明旭1,2,魯耀剛3,黃乙純1,羅章華3,吳晚霞1
    2018年第9期
    摘要
    引用本文
    摘 要:通過測試不同聚合物膠粉種類、不同聚合物膠粉摻量硫鋁酸鹽水泥砂漿在自然養護條件下的性能變化規律,研究了其對硫鋁酸鹽水泥砂漿性能的影響。結果表明:在自然養護條件下,當聚合物膠粉摻量為4%時,初凝時間和終凝時間分別延長30 min、20 min;當聚合物膠粉摻量為2%時,流動度提高了11.1%,1 d、28 d的抗折強度分別提高10.3%、15.73%;隨著聚合物膠粉摻量的增加,砂漿的早期抗壓強度(1 d)逐漸降低,當摻量為2%時,28 d抗壓強度小幅提高;隨著聚合物膠粉摻量的增加,干縮率逐漸降低。 Abstract: The effect of different kinds of polymer emulsion powder and dosage on sulpho-aluminate cement mortar under the condition of the natural curing were investigated. The results show that, under the condition of natural curing, the addition of 4% polymer emulsion powder extends the initial setting time 30 min and final setting time 20 min; when mixing with 2%, the fluidity increase 11.1%, the flexural strength of 1 d and 28 d cement mortar increase 10.3%、15.73%,respectively. And the compressive strength of 28 d cement mortar has a slight increase. With increasing polymer dosage, the early strength (1 d) and day shrinkage of mortar gradually decreases.
    康明旭,魯耀剛,黃乙純,等.聚合物膠粉摻量對硫鋁酸鹽水泥砂漿性能影響研究[J].混凝土與水泥制品,2018(9):28-31. KANG M X,LU Y G,HUANG Y C,et al.The Influence Research on Polymer Emulsion Powder Content on the Properties of Sulpho-aluminate Cement Mortar[J].China Concrete and Cement Products,2018(9):28-31.
    水分與氯離子在再生混凝土中的遷移規律
    水分與氯離子在再生混凝土中的遷移規律
    • 丁小雅1,張 鵬1,劉 慶2
    2018年第9期
    摘要
    引用本文
    摘 要:采用毛細吸鹽方法對水分及氯離子在再生混凝土中的遷移展開了研究。研究了不同取代率、不同氯鹽濃度下再生混凝土的水分和氯離子的侵入規律,分析了毛細吸鹽條件下水分和氯離子傳輸關系。結果表明,氯離子與水分的傳輸在再生混凝土中也呈現非同步性;再生粗骨料取代率大的試件中的水侵入深度約為氯離子侵入深度的3倍;在毛細吸附初期,二者滲透呈現近似線性相關關系。 Abstract: The intrusion laws of water and chloride ions in recycled concrete at different substitution rates and different chloride concentrations are studied. The relationship between moisture and chloride transport under capillary suction conditions is analyzed. The results show that the transport of chloride ion and moisture is also non-synchronous in the recycled concrete; the depth of water penetration in the sample with large replacement rate of regenerated aggregate is approximately 3 times the penetration depth of chloride; at the initial stage of capillary adsorption, penetration presents an approximately linear correlation.
    丁小雅,張鵬,劉慶.水分與氯離子在再生混凝土中的遷移規律[J].混凝土與水泥制品,2018(9):32-35. DING X Y,ZHANG P,LIU Q.Migration Rules of Water and Chloride Ions into Recycled Concrete[J].China Concrete and Cement Products,2018(9):32-35.
    預制裝配式與現澆整體式綜合管廊受力對比分析
    預制裝配式與現澆整體式綜合管廊受力對比分析
    • 王述紅,賀 宇,索善澤,韓光全
    2018年第9期
    摘要
    引用本文
    摘 要:預制裝配式綜合管廊具有施工周期短、經濟成本低、裝配方便等特點,但在實際工程中仍需考慮施工條件,土質特點等因素,選擇合適的施工方式。通過綜合分析、數值模擬等方式,將預制裝配式綜合管廊與現澆式管廊進行受力對比分析,研究預制裝配式綜合管廊的受力性能,以期為綜合管廊施工工藝的發展助力。 Abstract: The prefabricated assembly utility tunnel has the characteristics of short construction period, low economic cost and convenient assembly, but it still needs to be considered in combination with the construction conditions and soil characteristics in practical engineering to select the suitable construction methods. Through the comprehensive analysis, the numerical simulation and so on, the preprestress of the utility tunnel and the cast-in-place tunnel are compared, and the stress performance of the precast prestress corridor is studied and analyzed, which can be used as a reference for the development of the construction process of the utility tunnel.
    王述紅,賀宇,索善澤,等.預制裝配式與現澆整體式綜合管廊受力對比分析[J].混凝土與水泥制品,2018(9):36-38. WANG S H,HE Y,SUO S Z,et al.Comparison Analysis on Stress of Prefabricated Utility Tunnel and Cast-in-place Utility Tunnel[J].China Concrete and Cement Products,2018(9):36-38.
    新機場線8.8 m大直徑混凝土管片生產工藝及組織優化
    新機場線8.8 m大直徑混凝土管片生產工藝及組織優化
    • 楊寒冰,宋玉劍,任偉峰
    2018年第9期
    摘要
    引用本文
    摘 要:結合北京新機場線軌道交通工程的8.8 m大直徑盾構管片生產,分析了大直徑管片的產品及工藝特點,對大直徑管片的生產工藝及組織進行了系統優化,實現了管片生產每天兩循環的目標,經濟效益明顯,可為相似工程大直徑管片生產提供參考義。 Abstract: Combined with the production of 8.8 m large-diameter segment for the rail transportation project of Beijing New Airport Line, the product and process features of large-diameter segment are analyzed, and the organization and process of large-diameter segment producing are optimized systematically. Thereby, the target on two cycle producing per day is realized, which brings obvious economic benefits. There is a certain reference for the production of large-diameter segment for the similar project.
    楊寒冰,宋玉劍,任偉峰.新機場線8.8 m大直徑混凝土管片生產工藝及組織優化[J].混凝土與水泥制品,2018(9):39-41. YANG H B,SONG Y J,REN W F.Production Process and Organization Optimization of 8.8 m Large-diameter Concrete Segment for New Airport Line[J].China Concrete and Cement Products,2018(9):39-41.
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