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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

    基于工業廢渣再生微粉新型無熟料膠凝材料的試驗研究
    基于工業廢渣再生微粉新型無熟料膠凝材料的試驗研究
    • 李 東1,李鵬鵬1,田萬溪1,孫家瑛1,2
    2015年第10期
    摘要
    引用本文
    摘 要:基于正交試驗,以再生微粉、脫硫石膏、礦渣和鋼渣為主要原料,并復摻少量激發劑,探討了各種礦物成分摻量對新型無熟料膠凝材料強度、安定性、標準稠度需水量和凝結時間的影響,找出了與32.5級復合水泥強度等級相當的無熟料膠凝材料的配合比,并得到了各礦物組成的最佳配合比設計。同時,分別研究了養護條件對不同強度的新型無熟料膠凝材料的影響,當配合比中鋼渣含量低于15%時,在標準條件下養護效果最好;當鋼渣含量高于15%時,在空氣中的養護效果最好。 Abstract: Based on orthogonal test, renewable powder, desulfurized gypsum, slag and steel slag as the main raw material, mixed appropriate amount of activator, the influence of various mineral ingredients dosage on strength of new type binding material without cement clinker, stability, water requirement of standard consistency and setting time is discussed. The intensity level reached 32.5R strength grade mixing ratio of cement is found, the best of mix design for mineral composition is obtained. At the same time, the effects of curing conditions on different strength of new type binding material without cement clinker is studied. When the mix ratio of steel slag content is less than 15%, curing effects is the best under normal standard; when the content of steel slag is higher than 15%, curing effect is the best in the air.
    Ⅰ類品質再生粗骨料混凝土抗碳化性能試驗研究
    Ⅰ類品質再生粗骨料混凝土抗碳化性能試驗研究
    • 孔 哲,李秋義,郭遠新,謝汝朋,曹瑜斌
    2015年第10期
    摘要
    引用本文
    摘??要:采用建筑垃圾中的廢棄混凝土制備出Ⅰ類品質再生粗骨料,并按照不同的取代率替代天然粗骨料制備再生混凝土,研究了不同水泥用量體系下Ⅰ類品質再生粗骨料的取代率對再生混凝土抗碳化性能的影響。結果表明,再生混凝土的抗碳化性能隨著再生粗骨料取代率的降低和水泥用量的增加而逐漸增強,且逐漸接近于天然骨料混凝土;當水泥用量為500kg/m3且取代率為60%時,其碳化深度相比天然骨料混凝土僅增加0.3mm;再生混凝土中再生粗骨料的取代率不宜過高,最大取代率宜選擇在40%~60%之間。Abstract:TheclassⅠrecycledcoarseaggregateispreparedbyusingthewasteconcreteinconstructionwaste,andinaccordancewithdifferentsubstitutionrateofnaturalcoarseaggregateispreparedrecycledconcrete,theeffectofreplacementratioofclassⅠrecycledcoarseaggregateonthecarbonationresistanceofrecycledconcreteindifferentcementdosagesystem.Theresultsindicatethatthecarbonationresistanceofrecycledconcreteincreasesgraduallywiththedecreasingreplacementrateofrecycledcoarseaggregateandtheincreasingcementdosage,andisclosingtothenaturalaggregateconcrete;whenthedosageofcementis500kg/m3andreplacementrateis60%,thecarbonationdepthincreasesonly0.3mmwhichiscomparedwithnaturalaggregateconcrete;andthereplacementrateofrecycledcoarseaggregateinrecycledconcreteshouldnotbetoohigh,themaximumreplacementratecanchoosebetween40%~60%.
    鋼渣用于煤渣磚中的氡污染研究
    鋼渣用于煤渣磚中的氡污染研究
    • 武 林1,鄧躍全1,孫 婷1,崔宏星2,尚 兵2
    2015年第10期
    摘要
    引用本文
    摘 要:將鋼渣細粉摻入煤渣磚中,測量其氡析出濃度和抗壓強度,研究了鋼渣加入煤渣磚后的氡污染情況,鋼渣硬度高、表觀密度大、放射性弱,鋼渣細粉可填充煤渣磚的內部孔隙,形成了致密的結構,并且有足夠數量的白色結晶形成,對煤渣磚中的氡有一定的屏蔽效果,鋼渣本身對氡污染的貢獻不多。鋼渣細粉具有一定的活性,對煤渣磚的抗壓強度產生影響,在鋼渣加入量為35%時,抗壓強度達到最大,此時的氡析出濃度也較低。 Abstract: Adding steel slag powder into coal cinder bricks, concentration of radon exhalation and compressive strength are measured, radon contamination with steel slag is studied after joining coal cinder block. With high hardness, great apparent density, weak radioactive, steel slag powder can fill internal pore of cinder brick module, then form dense structure, and have enough white crystalline form, shielding effect of radon in coal cinder bricks is obtained, the steel slag itself on the contribution of radon pollution is not much. Steel slag powder has a certain activity, which has effect on compressive strength of coal cinder bricks, in the amount of steel slag is 35%, compressive strength is maximum, the concentration of radon exhalation is low.
    薄壁混凝土渡槽結構施工過程中的溫度應力分析
    薄壁混凝土渡槽結構施工過程中的溫度應力分析
    • 張永存1,李青寧2
    2015年第10期
    摘要
    引用本文
    摘 要:以實際工程為例,利用結構分析軟件建立了數值仿真分析模型;對渡槽混凝土溫度及應力進行了分析,并提出了相應的防裂措施;可為類似薄壁混凝土渡槽結構的施工提供借鑒和理論依據。 Abstract: As a example for a actual project, numerical simulation model is established by using structure analysis software; the analysis on temperature of concrete of aqueduct and stress are carried out, and the anti-cracks measures are proposed. Reference and theoretical basis of construction for thin concrete box aqueduct structure are provided.
    纖維石膏基復合材料力學性能研究
    纖維石膏基復合材料力學性能研究
    • 張維渤,熊 峰,余明玖,陳 江
    2015年第10期
    摘要
    引用本文
    摘 要:為了改善石膏墻體材料的力學性能,分別采用Y型束狀單絲聚丙烯纖維和高強高模聚乙烯醇短纖維作為建筑石膏的增強材料,通過力學性能測試研究了纖維長度和摻量對石膏基復合材料力學性能的影響。結果表明,添加聚丙烯纖維對復合材料力學性能為負面影響,不能直接用于現澆石膏隔墻體系。添加聚乙烯醇纖維對復合材料力學性能有改善作用,纖維長度為9mm,摻量為1.5%時,試樣的絕干抗折強度和吸水飽和抗折強度較空白試樣分別提高了82.5%和83.9%,抗壓強度略低于空白試樣。結合彎曲荷載-變形曲線,分析了聚乙烯醇纖維增強石膏基復合材料的斷裂機理,結果表明:斷裂過程分為基體斷裂彈性受力、纖維拔出、破壞三個階段,纖維與基體的界面黏結能力是纖維抗拉強度能否充分利用的關鍵。 Abstract: In order to improve the mechanical properties of gypsum material, Y bundle monofilament polypropylene fiber and high elasticity polyvinyl alcohol fiber are respectively used as reinforced material of building gypsum. The effect of fiber length and fiber content on mechanical properties of gypsum based composite materials is studied by mechanical properties test. The results show that, the effect on mechanical properties of composite material by adding polypropylene fiber is negative, and polypropylene fiber can't be applied directly in cast-in-site gypsum partition wall system. Mechanical properties of the composite material can be improved by adding polyvinyl alcohol fiber. When the length of polyvinyl alcohol fiber is 9 mm, the content is 1.5%, the dry flexural strength and water saturated flexural strength of specimen compared with the blank sample are increased by 82.5% and 83.9% respectively, the compressive strength is slightly lower than the blank sample. Combined with the bending load-deformation curve, the fracture mechanism of polypropylene fiber reinforced gypsum based composite material is analyzed. The results show that, the fracture process can be divided into 3 stages: the base material fracture elastic stress stage, fiber pull-out stage and failure stage, the interface bonding capacity between fiber and matrix is the key factor for making the best use of fiber tensile strength.
    復合助劑改性建筑石膏的線性膨脹系數
    復合助劑改性建筑石膏的線性膨脹系數
    • 楊建森,劉 源,馬瑞潔,趙 冰,王文麗
    2015年第10期
    摘要
    引用本文
    摘??要:采用正交試驗研究了水膠比、硅粉、白水泥和聚合物膠粉摻量等組成參數對復合助劑改性建筑石膏線性膨脹系數的影響,并通過多元回歸分析建立了復合助劑改性建筑石膏的線性膨脹系數模型。結果表明,復合助劑改性建筑石膏的線性膨脹系數基本分布在(19.7~22.4)×10-6℃-1之間,小于建筑石膏的線性膨脹系數,溫度膨脹性能有一定改善;隨著聚合物5010、白水泥、硅粉摻量的增加,石膏的線性膨脹系數逐漸減??;復合助劑改性建筑石膏的線性膨脹系數與組成參數之間存在二次曲線關系,并且游程檢驗法檢驗其相關性顯著。Abstract:Theinfluenceofwater-binderratio,silicafume,whitecementandpolymerdosageonlinearexpansioncoefficientofcompositeadmixturemodifiedalcinedgypsum(CAMAG)throughorthogonalexperimentisstudied,thecalculationmodeloflinearexpansioncoefficientrelatedtocomponentparametersisestablishbymultipleregressionanalysis.TheresultsshowthatthelinearexpansioncoefficientofCAMAGdistributesbetween(19.7~22.4)×10-6℃-1,whichislessthancalcinedgypsum,temperatureexpansionperformanceofCAMAGhasacertainimprovement.Withincreasingdosageofpolymer5010,whitecementandsilicafume,thelinearexpansioncoefficientofgypsumdecreases.Quadraticcurverelationshipcandescribethecorrelationbetweenlinearexpansioncoefficientandcomponentparameters,and?correlationissignificantbyruntest.
    水灰比和外加劑對泡沫混凝土性能的影響
    水灰比和外加劑對泡沫混凝土性能的影響
    • 何立糧,楊立榮,張寶強
    2015年第10期
    摘要
    引用本文
    摘 要:研究了水灰比、激發劑高錳酸鉀摻量、早強劑三乙醇胺摻量對化學發泡泡沫混凝土干密度和抗壓強度的影響。結果表明,適宜的水灰比為0.46,高錳酸鉀適宜摻量為5%,三乙醇胺能減少泡沫混凝土密度,但其強度也隨之降低,適宜摻量為0.04%。 Abstract: The influence of W/C, activator for potassium permanganate dosage and early strength agent for triethanolmine on dry density and compressive strength of chemical foamed foam concrete is studied. The results show that, the suitable dosage of W/C is 0.46, the content of potassium permanganate is 5%, the triethanolamine can decrease density of foamed concrete, and compressive strength is reduced. The suitable content of triethanolamine is 0.04%.
    聚苯板保溫復合剪力墻板的抗彎性能與熱工性能分析
    聚苯板保溫復合剪力墻板的抗彎性能與熱工性能分析
    • 戎 賢1,2,許丹丹1,2,王海濤1,2,劉 平1,2
    2015年第10期
    摘要
    引用本文
    摘 要:研究了三種插筋形式下的聚苯板保溫復合墻板的抗彎性能及熱工性能;分析得出了三種插筋形式的試件在受彎承載力和剛度方面均能滿足正常使用的要求,垂直插筋形式的試件受力性能更好,承載力和剛度更高,結構形式更穩定,能夠有效地約束混凝土的變形。通過熱工性能分析,垂直插筋形式的試件節能效果好,穿孔率比其他兩種形式要小,可進一步通過減少插筋量來提高熱工性能。 Abstract: The bending property and thermal performance of polystyrene insulation composite wall board is studied through three steel inserting forms, the requirements for bending capacity and stiffness of specimens with three kinds of inserting form can be satisfied. Mechanical properties of specimen with vertical inserting form is better, which have higher capacity and stiffness and more stable structure form, deformation of concrete can be effectively restrained. Through the analysis of thermal performance, the specimen with vertical inserting form has good energy saving effect, perforation rate is smaller than the other two forms, which can improve thermal performance by reducing the number of inserted bars.
    PVA 纖維水泥基復合材料橋面連接板試驗研究
    PVA 纖維水泥基復合材料橋面連接板試驗研究
    • 王浩宇1,田穩苓1,周鐵華2,崔磊濤3
    2015年第10期
    摘要
    引用本文
    摘 要:通過靜力加載試驗,以兩跨簡支橋梁為原型,對比分析了普通鋼筋混凝土連接板和PVA-ECC纖維混凝土連接板在正常使用過程中的抗裂和抗滲性能。結果表明,PVA-ECC纖維混凝土連接板開裂荷載是普通鋼筋混凝土連接板的2.5倍;普通鋼筋混凝土連接板的裂縫數量較少,平均間距76.8mm,最大裂縫寬度0.21mm;PVA-ECC纖維混凝土連接板的裂縫數量較多,平均間距22.6mm,最大裂縫寬度小于0.1mm。相同荷載作用下,普通鋼筋混凝土連接板的混凝土應變比PVA-ECC纖維混凝土連接板大,但鋼筋應變較小。 Abstract: Through the static loading test with two span simply supported bridges, the analysis on performance of crack resistance and impermeability of ordinary reinforced concrete connecting plate and PVA-ECC fiber reinforced concrete connecting plate during normal use is compared. The results show that the cracking load of PVA-ECC fiber connection reinforced concrete slab is 2.5 times as large as ordinary reinforced concrete. Ordinary reinforced concrete connecting plate has smaller cracks and the average distance is 76.8mm and the maximum crack width is 0.21mm. In contrast, PVA-ECC fiber reinforced concrete slab has bigger cracks and the average distance is 22.6mm and maximum crack width is less than 0.1mm. With the same load, the concrete strain of the ordinary reinforced concrete slab is bigger than the PVA-ECC fiber reinforced concrete slab, but the steel strain of the ordinary reinforced concrete slab is smaller.
    基于正交試驗的SFRC動態抗壓性能研究
    基于正交試驗的SFRC動態抗壓性能研究
    • 楊明宇,謝衛紅,周 楠
    2015年第10期
    摘要
    引用本文
    摘 要:在三種氣壓下,采用SHPB裝置對四因素四水平正交試驗的SFRC試件進行沖擊試驗。給出了不同因素對SFRC動態抗壓強度影響的主次關系、顯著程度和最優組合,分析了SFRC試件的破壞形態,用含損傷因子的ZWT本構模型對SFRC力學行為進行了擬合。試驗結果表明,砂率在低應變率下對強度影響最大,水膠比在中高應變率下對強度影響最大。受沖擊時高鋼纖維摻量能強化鋼纖維增韌效果,弓形鋼纖維更易保持SFRC試件形狀。 Abstract:At three different pressures, the impact tests of SFRC specimens with orthogonal tests of four factors and four levels are carried out by using 74mm SHPB test device. The primary and secondary relationships, significant degree and optimal combination of different factors on dynamic compressive strength of SFRC are given, the damage form of SFRC is analyzed, and the mechanical behavior of SFRC is fitted by using ZWT constitutive model with damage factor. The results show that the sand rate is the biggest impact on strength in the low stain rate, the water cement ratio is the biggest impact on strength in the high stain rate, high steel fiber content can strengthen toughening effect of steel fiber by impact, bow steel fiber is more easily to maintain shape of SFRC.
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