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    蘇州混凝土水泥制品研究院有限公司

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    第十期

    高分子乳液型養護劑的研制及應用
    高分子乳液型養護劑的研制及應用
    • 李享濤,謝永江,孔慶欣,朱長華,王保江
    2013年第10期
    摘要
    引用本文
    摘 要:通過優化養護劑組分,研制出有效保水率高、在新鮮混凝土面成膜快的高分子乳液型養護劑,室內對比研究了三種養護方式(標準養護、自然養護和養護劑養護)對混凝土強度、耐久性和塑性收縮、開裂的影響,并采用該養護劑在干旱風沙地區進行了工程應用。結果表明,與標準養護相比,養護劑養護下混凝土7d前強度不降低,56d強度僅降低約5%,90d自然碳化深度為0,氯離子滲透性略有增加;成膜養護劑能有效降低混凝土塑性收縮和開裂程度,用于干旱風沙地區混凝土養護具有明顯的技術經濟性能優勢。 Abstract: As a new type of curing method, spraying curing agent is being gradually applied in concrete engineering. In this paper,through the optimization of components, the concrete curing agent based on polymer emulsion with high moisture retention rate and fast film forming on fresh concrete surface is prepared. The effects of curing methods (i.e. standard curing, drying curing and curing with curing agent) on strength, durability and plastic shrinkage and cracking of concrete are studied, then the curing agent is applied in arid-sandy area. The results indicated that compared with standard curing, the strength of concrete with curing agent is not reduced before 7d, and only reduced by about 5% at the age of 56d, natural carbonation depth of concrete with curing agent is equal to zero at the age of 90d, but the chloride ion permeability of concrete slightly increased up to 30%. Besides, compared with other curing methods, curing agent can effectively reduce the plastic shrinkage and cracking of concrete, and has significantly technical and economical advantages in arid-sandy area.
    海洋浪花飛濺區混凝土硫酸鹽侵蝕試驗研究
    海洋浪花飛濺區混凝土硫酸鹽侵蝕試驗研究
    • 馬志鳴1,趙鐵軍2,王鵬剛2,盧 峰2
    2013年第10期
    摘要
    引用本文
    摘 要:對混凝土試件進行海邊暴露試驗,研究海邊浪花飛濺區域混凝土硫酸鹽侵蝕試驗,利用分光光度計法測定硫酸根離子的含量。試驗結果表明,混凝土中總硫酸根離子濃度隨著腐蝕齡期的增加而升高,但后期增加幅度逐漸降低;混凝土中總硫酸根離子濃度因水膠比、水泥用量不同而不同;摻加礦物摻合料可以明顯改善混凝土的抗硫酸鹽侵蝕能力。 Abstract: The content of sulfate under marine environment is tested. The sulfate erosion test under marine environment is studied. The result show that the concentration of total sulfate ion in the concrete increases with the increase of the age of corrosion, but the increase amplitude is gradually decreased in the later age. The concentration of the total sulfate ion in the concrete varies with the different water-cement ratio and cement consumption. Mixing with mineral admixtures can significantly improve the sulfate resistance capacity of concrete.
    輕質多孔水泥基吸聲材料的設計、制備與性能研究
    輕質多孔水泥基吸聲材料的設計、制備與性能研究
    • 宦文娟,張云升,李 剛
    2013年第10期
    摘要
    引用本文
    摘??要:系統研究了陶粒、陶砂、珍珠巖等不同多孔骨料對水泥基材料吸聲性能的影響。在此基礎上,探討了膠凝材料用量、纖維用量(0.5kg/m3、0.9kg/m3)、引氣劑摻量(0.003%、0.005%、0.008%、0.01%)、憎水劑、壓縮比(1、1.3、1.6、2)、表面刻槽等因素對水泥基吸聲材料性能的影響規律,并研制出一種吸聲效果良好,同時符合強度要求的水泥基多孔吸聲材料。實驗結果表明,在密實成型工藝下,加入適量纖維、引氣劑,選擇適當壓縮比,并且引入空腔共振結構可以提高材料在特定吸聲頻段的吸聲性能;憎水處理改善了材料浸水后的吸聲性能。Abstract:Influenceofaggregatesasceramisite,potterysandandperliteindifferentcombinationonthesound-absorptionperformanceofcement-basedmaterialissystematicallystudied.Theeffectofcementcontent,fibercontent(0.5kg/m3、0.9kg/m3),air-enteringagentcontent(0.003%、0.005%、0.008%、0.01%),waterrepellent,compressionratio(1、1.3、1.6、2)andgrooveonthepropertyofcement-basedsoundabsorbingmaterialisinvestigatedrespectively.Onekindofporoussoundabsorbingmaterialispreparedwhichmetthestrengthrequirementsimultaneously.Resultsindicatethatsoundabsorbingperformanceindifferentabsorbingbandsisefficientlyimprovedunderthecompactingmoldingprocessbyaddinganappropriatedosageoffiber,air-enteringagent,selectingtheappropriatecompressionratioandintroducingcavityresonancestructure.Hydrophobictreatmentalsoallowsitimprovedefficientlyafterwaterimmersion.
    水泥基滲透結晶型防水涂料的制備技術研究
    水泥基滲透結晶型防水涂料的制備技術研究
    • 代德偉,路國忠,文天陽
    2013年第10期
    摘要
    引用本文
    摘??要:以水泥、石英砂等為主要基材,并摻入多種活性化學物質制備水泥基滲透結晶型防水涂料,探討了水泥的品種及加量、石英砂的級配及活性物等對水泥基滲透結晶型防水涂料性能的影響。測試結果表明,涂料的各項性能指標均已達到或超過了國家標準,且不低于國外同類產品的性能指標。Abstract:Thecementandquartzsandarethemainmaterialswhicharemixedwithavarietyofactivechemicalstopreparethecementitiouscapillarycrystallinewaterproofcoating.Theinfluencesofthevarietiesandthedosageofcement,quartzsandgradationandactivechemicalsontheperformanceofcementitiouscapillarycrystallinewaterproofingcoatingarediscussed.ThetestresultsshowthatallperformanceindexeshavereachedorexceededGB18445—2001nationalstandard,whichisalsonotlowerthanforeignproductsperformanceswiththesamekind.
    粉煤灰對水泥-石灰石粉膠凝材料開裂性能的改善研究
    粉煤灰對水泥-石灰石粉膠凝材料開裂性能的改善研究
    • 肖 佳1,郭明磊1,許彩云2,孟慶業1
    2013年第10期
    摘要
    引用本文
    摘 要:研究了水泥-石灰石粉膠凝材料干縮和開裂性能以及粉煤灰對其干縮和開裂性能的改善作用。研究得到水泥-石灰石粉膠凝材料的干縮隨石灰石粉摻量增加出現先增大后減小的規律,石灰石粉摻量為10%時,硬化漿體的干縮達到最大值。隨粉煤灰摻量增加,水泥-石灰石粉硬化漿體的干縮隨之減少。隨石灰石粉摻量增加,水泥-石灰石粉膠凝材料的開裂呈現先增大后減小的規律,摻量為10%時的開裂最大;隨粉煤灰摻量增加,粉煤灰對水泥-石灰石粉膠凝材料開裂性能的改善逐漸增強。水泥-石灰石粉膠凝材料的開裂性能與其干縮性能有著較大的相關性,干縮減少,其開裂指數逐漸降低,抗開裂性能提高。 Abstract: The drying shrinkage and cracking property of the cement-ground limestone cementitious material and the improvement of fly ash on the drying shrinkage and cracking property of the cement-ground limestone cementitious material are studied. The results show that the drying shrinkage of the cement-ground limestone cementitious material increases at first and decreases later with the ground limestone content increasing, which reaches the maximum when ground limestone content is 10%. The drying shrinkage of the cement-ground limestone cementitious material decreases with the fly ash content increasing. The cracking of the cement-ground limestone cementitious material increases at first and decreases later with the ground limestone content increasing, which reaches the biggest cracking at the ground limestone content of 10%. The increase of the fly ash content boosts the improvement of the fly ash on the cracking property of the cement-ground limestone cementitious material. The drying shrinkage and cracking property of the cement-ground limestone cementitious material have a lot of correlation, the decrease of drying shrinkage corresponds to the reduction of the cracking index and the improvement of anti-cracking property.
    不發火混凝土的配制與性能研究
    不發火混凝土的配制與性能研究
    • 蘇藝凡1,陳 茜1,徐仁崇1,劉光銳1,劉君秀2,陳賢錫2
    2013年第10期
    摘要
    引用本文
    摘 要:對骨料的不發火性進行檢驗,采用白云石及石灰石作為骨料配制不發火混凝土,研究使用不同的骨料對水泥膠砂和混凝土工作性、強度變化的影響。結果表明,不發火骨料的膠砂流動度較高;以白云石為骨料配制的中低強度混凝土前期強度較低,后期強度滿足要求,而以石灰石為骨料配制的中低強度混凝土前期和后期強度都相對較高。 Abstract: The misfired properties of each kind of aggregates are testified and the dolomite and limestone aggregates are chosen to make misfired concrete. The influences of different aggregates on the workability and strength of cement mortar and concrete are investigated. The results show that the misfired aggregates provide higher fluidity of cement mortar. The low strength concrete with dolomite has lower early strength and higher long-term strength. The low strength concrete with limestone has higher early strength and higher long-term strength.
    在寒冷地區存放使用預應力鋼筒混凝土管易被忽視的問題
    在寒冷地區存放使用預應力鋼筒混凝土管易被忽視的問題
    • 李金瑞,胡孝民,楊鐵占
    2013年第10期
    摘要
    引用本文
    摘 要:分析了預應力鋼筒混凝土管砂漿保護層的要求以及砂漿凍融破壞的原因,提出了在寒冷地區存放使用預應力鋼筒混凝土管易被忽視的問題,并給出了相應措施。指出應提高砂漿保護層的質量,避免在冬季將管子長期處于過度潮濕的地方,有利提高管的使用壽命。 Abstract: The demands of mortar cover of prestressed concrete cylinder pipe(PCCP) and the reason why THE mortar would happen to the freezing-thaw damage are analyzed. When the PCCP is stored and used in cold area, the easily neglected problems and the corresponding measures are put forward. For prolonging the service life of the PCCP,it is very important to improve the quality of the mortar cover and avoid to place the PCCP in the frozen wet environment for a long time.
    小半徑曲線加寬型軌枕的研制
    小半徑曲線加寬型軌枕的研制
    • 鄭愛國,康祥梅
    2013年第10期
    摘要
    引用本文
    摘 要:為了適應山區小曲線半徑(R<300m)線路,結合工廠現有產品實際情況,研發了小半徑曲線加寬型預應力混凝土軌枕。該軌枕應用后,發現減少了養護、維修工作量,降低了維修費用,有效解決了小曲線半徑中的不良病害,具有較好的社會效益和經濟效益。 Abstract: In order to adapt to the small curve radius (R < 300m) line in mountainous area, combined with the actual situation of existing products of factory, the prestressed concrete sleepers with small radius curve widening type are researched and developed. The application results of the sleepers indicate that it can reduce maintenance and repair workload and maintenance cost, and effectively solve the problems about adverse disease of small radius curve, which shows good social and economic benefits.
    鋼管混凝土受壓短柱剛度的試驗研究
    鋼管混凝土受壓短柱剛度的試驗研究
    • 張 翔1,劉鵬程2
    2013年第10期
    摘要
    引用本文
    摘 要:針對混凝土強度對鋼管混凝土受壓短柱剛度的影響,進行了試驗研究。結果表明,隨著混凝土強度的增高,混凝土彈性模量的增大,構件的豎向和抗彎剛度均增大?;炷翉姸葘︿摴芑炷潦軌憾讨鶆偠鹊挠绊懗潭葹椋狠S壓構件>小偏壓構件>大偏壓構件。 Abstract:The effect of concrete strength on the stiffness of concrete filled steel tube short columns under compression is studied by some experiments. The results show that with the increasing of strength and elastic modulus of concrete, vertical and flexural stiffness of the components are all increased. And the influence degree of concrete strength on the stiffness of concrete filled steel tube short columns under compression: axial compression member>small eccentric compression member>large eccentric compression member.
    FRP-混凝土-鋼管組合方柱軸心抗壓試驗研究
    FRP-混凝土-鋼管組合方柱軸心抗壓試驗研究
    • 王 代1,2,段向攀3,王勇智2
    2013年第10期
    摘要
    引用本文
    摘 要:通過6個FRP-混凝土-鋼管組合方柱的試驗研究,考察在軸心受壓情況下,組合柱內混凝土的受力性能。結果表明:組合柱在加載后期表現出了良好的延性,且由于內、外管的雙層約束,組合柱中混凝土強度均得到了一定程度的提高。通過分析本文和國內外相關試驗結果,提出了FRP-混凝土-鋼管組合方柱中混凝土的峰值應力和峰值應變的計算公式,經驗證計算值與試驗值吻合較好。 Abstract: Through the experiment study of 6 FRP-concrete-steel tube composite square columns under axial concentric compression, the mechanical behavior of the concrete of composite columns is investigated. The results indicate that the composite columns show good ductility in the last stage of loading, and due to the double-skin confinement from the inner and outer tubes, the strength of concrete of composite columns is improved to some degree. Through analyzing the related experimental results from this paper as well as China and abroad, new formulas for the peak stress and peak strain of the concrete of FRP-concrete-steel tube composite square columns are put forward, and the calculated values agree well with the test ones.
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