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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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    論蒸壓纖維素纖維水泥板的可持續性
    論蒸壓纖維素纖維水泥板的可持續性
    • 沈榮熹
    2011年第1期
    摘要
    引用本文
    摘 要:蒸壓纖維素纖維水泥(ACFC)板是當今國內外產量最高、應用最廣泛的非石棉纖維水泥制品。本文從原材料、生產過程、使用與廢棄四個方面分析和論述了ACFC板材的可持續性,并參照國外先進經驗、結合我國國情,探討了如何進一步提升我國ACFC板的可持續性問題。 Abstract: Nowadays autoclaved cellulose fibre cement(ACFC)boards are the largest products in production and application among non-asbestos FRC products in the world. The sustainability of ACFC boards in four aspects, i.e. raw materials, manufacture process, use and disposal are analyzed and evaluated. On the base of investigating the advanced experience of some foreign companies and considering the concrete circumstance of our country,the measures about how to further upgrade the sustainability of ACFC boards in China are discussed.
    混凝土外加劑對硫鋁酸鹽水泥水化歷程的影響
    混凝土外加劑對硫鋁酸鹽水泥水化歷程的影響
    • 黃士元1,鄔長森2,楊榮俊2
    2011年第1期
    摘要
    引用本文
    摘 要:采用X射線半定量分析方法研究了在快硬混凝土中摻加緩凝劑和促硬劑對硫鋁酸鹽水泥凝結時間、水化歷程、水化產物種類的影響。結果表明:快硬硫鋁酸鹽水泥的水化產物主要有AFt、AFm、C4AH13及Al(OH)3,而C2S的水化非常緩慢;快硬硫鋁酸鹽水泥快凝早強的主要原因是AFt的生成,而后期強度發展停滯甚至倒縮的原因主要是AFt向AFm的轉化,后期C2S的水化可能彌補這一缺陷;緩凝劑的作用是阻礙了C4A3■和鐵鋁礦物的水化,并且抑制了AFt向AFm的轉化;促硬劑的作用是與緩凝劑發生化學反應,終止了緩凝作用,使硫鋁酸鹽型水泥礦物恢復正常水化。 Abstract: The effects of retarder and accelerator on the setting time, hydration progress and hydration products of rapid hardening sulphoaluminate cement are studied by semi-quantitative XRD analysis method. The results show that the main hydration products of rapid hardening sulphoaluminate cement are Aft, AFm, C4AH13 and Al(OH)3, the hydration of C2S proceeds rather slowly. The rapid setting and strength development are due to the formation of AFt, whereas the cease of strength increase and even strength regress of sulphoaluminate cement at later ages are caused by conversion of AFt to AFm, the hydration of C2S at later ages may supply this gap. The effect of retarder may be explained as that it prevents the hydration of C4A3 ■and ferric aluminium compounds and restrains the conversion of AFt to AFm. The added accelerator takes a chemical reaction with the retarder and immediately stops its retarding action, so that the accelerator makes C4A3■ recover to hydrate normally.
    等強條件下混凝土收縮徐變試驗研究與現場監測
    等強條件下混凝土收縮徐變試驗研究與現場監測
    • 孟凡利1,何智海2,錢春香2,錢桂楓3,程 飛3
    2011年第1期
    摘要
    引用本文
    摘??要:采用自制的試驗裝置,研究了混凝土組分對7d等強條件下混凝土收縮徐變的影響規律和機理,以配制和優化高鐵混凝土。通過現場監測在建預應力混凝土橋梁的應變,并與JTGD62-2004《公路鋼筋混凝土及預應力混凝土橋涵設計規范》的計算值進行了比較。結果表明,雙摻質量比2:1的粉煤灰和礦渣及摻用減縮劑(SRA)可以有效降低混凝土收縮徐變,其中以摻減縮劑效果最好;聚乙烯醇(PVA)纖維可以降低自收縮,但會增加干燥收縮和徐變,不宜用于配制高鐵混凝土;排除彈性和溫度應變的影響,現場監測的收縮和徐變應變在加載80d左右趨于穩定,保持在(165~200)×10-6之間,各跨中截面的下底板應變略高于上頂板值;計算值與監測值相差很大,計算值過于保守,不宜直接用于指導工程施工。Abstract:Theinfluencelawandmechanismofconcreteconstituentsonshrinkageandcreepofconcretewith7dayssamecompressivestrengtharestudiedbytheself-madetestdevicetoproduceandoptimizeconcreteforhighspeedrailway.Theteststrainsofprestressedconcretebridgeunderconstructionbyfieldmonitoringarecomparedwiththecalculatedvaluesbyuseofthedesignspecificationsofprestressedconcretebridgeandculvertandhighwayreinforcedconcrete(JTGD62-2004).Theresultsindicatethatshrinkagereducingadmixture(SRA)andthemassratio2:1offlyashandslagcanreduceeffectivelyshrinkageandcreepofconcrete,andtheeffectwithSRAisbest.Polyvinylalcohol(PVA)fibercandecreaseautogenousshrinkage,butincreasedryshrinkageandcreep,whichisnotsuitabletoproduceconcreteforhighspeedrailway.Thetestshrinkageandcreepstrainsbyfieldmonitoringtendtobestableafterabout80days’loading,whichiskeepingon(165~200)×10-6,andthebottomplatestrainsofmid-spansectionsarealittlemorethantheseofupperplateexceptelasticstrainsandtemperaturestrains.Thecalculatedvaluesdifferobviouslyfromthetestvalues,andthecalculatedvaluesareover-conservative,whicharenotsuitabletodirectlyguidetheengineeringconstruction.
    不同外加劑對PHC樁混凝土拉壓比的影響研究
    不同外加劑對PHC樁混凝土拉壓比的影響研究
    • 姜正平1,2, 宋旭艷1,何耀輝2,許國林2,廖樹基2
    2011年第1期
    摘要
    引用本文
    摘 要:以廣東宏基集團管樁生產配合比為基本參照,分別摻入萘系、聚羧酸、氨基磺酸鹽和磺化丙酮,通過測定混凝土的抗壓強度、劈裂抗拉強度和對混凝土耐久性的研究,分析了四種不同減水劑對PHC樁混凝土拉壓比的影響。結果表明:隨著減水劑摻量的增加,混凝土的抗壓強度增大;隨著出釜后放置時間的延長,劈裂抗拉強度增大,拉壓比增大;不同減水劑作用下,摻磺化丙酮的抗壓強度最高而摻聚羧酸的最低,摻聚羧酸的拉壓比最大而摻磺化丙酮的最小。因此,摻聚羧酸的PHC樁混凝土脆性最小,抗裂耐打性最好;摻磺化丙酮的PHC樁混凝土脆性最大,抗裂耐打性最差。 Abstract: Based on the mix proportion in Guangdong HONGJI Group Co., Ltd., naphthalene water reducer, polycarboxylic acid water reducer, sulphamate water reducer and sulphonated acetone are respectively added into pile concrete. The compression strength, splitting tensile strength and durability of concrete are tested, and the effects of four water reducers on the ratio of tension strength and compression strength of PHC piles are analyzed. The results show that, with the content of water reducer increasing, compressive strength of concrete is improved. With the extension of deposit time out of autoclave, splitting tensile strength of concrete is improved and the ratio of tensile strength and compressive strength is raised. Under the actions of different water reducers, compressive strength of concrete with sulphonated acetone is highest but that with polycarboxylic acid water reducer is lowest, and the ratio of tensile strength and compressive strength of concrete with polycarboxylic acid water reducer is largest but that with sulphonated acetone is smallest. Therefore, the brittleness of PHC piles with polycarboxylic acid water reducer is least but crack resistance and beating resistance of that are best. The brittleness of PHC piles with sulphonated acetone are largest but crack resistance and beating resistance of that are worst.
    礦渣、鋼渣基膠凝材料的耐久性研究
    礦渣、鋼渣基膠凝材料的耐久性研究
    • 李 倩1,趙風清1,李 豪1,張若思2,劉立星3
    2011年第1期
    摘要
    引用本文
    摘 要:以工業廢渣為主要原料制備的膠凝材料屬低碳生態型膠凝材料。本文對兩種礦渣、鋼渣基膠凝材料—礦渣基膠凝材料(GBSC)和礦渣-鋼渣基膠凝材料(SSC)的耐久性進行了試驗研究,考察了長期強度、干燥收縮、抗滲性、抗凍性、抗碳化、抗硫酸鹽侵蝕等耐久性因素。結果表明:兩種膠凝材料具有優良的耐久性能,尤其在干燥收縮和抗硫酸鹽性能方面更具優勢,但抗碳化性能不如普通硅酸鹽水泥(P·O42.5)。 Abstract: The cement prepared from large industrial waste residue, belongs to low carbon and eco-type cementing material. In this paper, the durability of two kinds of cementing materials, granulated blast-furnace slag cementing material(GBSC) and steel slag cementing material(SSC), are investigated for the durability, such as long-term strength, drying shrinkage, impermeability, frost resistance, carbonization performance and anti-sulfate erosion. The results indicate that GBSC and SSC have good durability except carbonization performance. Compared with ordinary portland cement(P·O42.5), SSC and GBSC show priorities in drying shrinkage and anti-sulfate erosion.
    PHC管樁專用新型復合增強劑的研制與應用研究
    PHC管樁專用新型復合增強劑的研制與應用研究
    • 溫慶如1,3,于飛宇2,3,方云輝1,3,蔣卓君1,3,曾沖盛3,林添興1,3
    2011年第1期
    摘要
    引用本文
    摘 要:研究制備了一種適用于PHC管樁混凝土的新型復合增強劑Point-GS。合成過程引入酰胺小單體進行共聚,復配過程使用固體硅酸鈉和自制有機醇胺類復合激發劑。試驗檢驗了該增強劑的應用性能,結果表明該增強劑能滿足PHC管樁混凝土的工作性能和力學性能要求,并且更加環保、經濟,具有良好的應用前景。 Abstract: A new type compound reinforcing-agent Point-GS is synthesized for PHC piles. The experiment is carried by copolymerization using amide monomer, solid sodium silicate and homemade alkanolamine as compound stimulating agent in the mixing process. The application performance of the reinforcing-agent is examined by the experiment. The results show that this reinforcing-agent has a bright prospect of application, because of its good work performance and mechanical properties in PHC piles concrete application.
    C80高強混凝土配比試驗研究
    C80高強混凝土配比試驗研究
    • 周文彪,周秀芬
    2011年第1期
    摘要
    引用本文
    摘 要:以阿聯酋阿卡扎比薩姆斯項目C80混凝土配比設計與試驗研究為例,敘述了高強混凝土配比設計的方法、步驟及問題處理方法。 bstract: Taking the design of mix proportion and experimental research of C80 concrete for Shams Project in Abu Dhabi of United Arab Emirates as a case, the methods and steps of the design of mix proportion for high strength concrete and the solutions to problems are described in detail.
    靜壓管樁的發展和應用
    靜壓管樁的發展和應用
    • 王 離
    2011年第1期
    摘要
    引用本文
    摘 要:靜壓管樁就是借助靜力壓樁機將預應力混凝土管樁壓入地基土中的一種基礎形式的簡稱。壓樁機根據加力部位的不同,可分為頂壓式和抱壓式以及其他形式,目前用得最多的是全液壓抱壓式壓樁機。靜壓樁可分為靜壓方樁和靜壓管樁,目前用得最多的是靜壓管樁。 Abstract:Static pressed pile is a kind of shortening of basis form when using hydrostatic pressure pile driver pushing prestressed piles into foundation soil. According to adding force position differently, hydrostatic pressure pile driver can be divided to top compression and other forms. Currently, the most used pressure pile drive is full hydraulic pile pressing machine with cramp pressing. Static pressure piles can be divided into static pressed square piles and static pressed piles. Currently, the static pressed piles are most used.
    關于管樁離心成型工藝參數的確定
    關于管樁離心成型工藝參數的確定
    • 嚴志隆
    2011年第1期
    摘要
    引用本文
    摘 要:提出了當前我國管樁離心成型工藝存在的問題,論述了離心成型工藝參數(各階段的離心速度n和離心時間t)確定的計算方法。 Abstract:Existing problems in recent pipe centrifugal casting technology are indicated, and the calculating methods about the technology parameters(the centrifugal speed‘n’ and centrifugal time in each stage‘t’) in centrifugal casting technology are discussed.
    高壓蒸養與免高壓蒸養PHC管樁預應力損失試驗研究
    高壓蒸養與免高壓蒸養PHC管樁預應力損失試驗研究
    • 吳 鋒1,周資斌2,邱 松1,卓 楊1
    2011年第1期
    摘要
    引用本文
    摘 要:針對現有高壓蒸養和免高壓蒸養兩種不同養護工藝生產的PHC管樁,本文開展了PHC管樁的預應力損失試驗研究。采用兩種不同的測試方法,系統地研究了不同養護工藝的PHC管樁放張、混凝土收縮徐變和鋼棒松弛等各階段的預應力損失,對比分析了養護工藝對PHC管樁預應力損失的影響,為準確計算其極限承載力提供了必要的試驗依據,并驗證了兩種測試方法的準確性和可靠性。 Abstract:For two different existing curing processes of PHC pile production, which are the high-pressure steam curing and the atmospheric steam curing, the experimental research on the prestressed loss of PHC piles is carried out. Through two different testing methods, the prestressed losses of PHC piles by different curing processes during each stage in the production processes, such as pile tension, concrete shrinkage and creep and steel relaxation are systematically researched. In addition, comparative analysis on the impact of different curing processes on the prestressed loss of PHC piles is conducted, which not only provides a necessary experimental basis of calculating the ultimate bearing capacity, but also verifies the accuracy and reliability of these two testing methods.
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