第八期_2014_《混凝土與水泥制品》雜志社

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第八期

再加工溫度對燃煤電廠廢石膏性能的影響研究

宋旭艷，韓靜云，郜志海

２０14年第8期

摘要

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摘要：以江陰某發電廠排放的煙氣脫硫石膏為原料，再加工熱處理后，研究熱處理脫硫石膏水化體系的強度和凝結時間。結果顯示，再加工處理溫度達150℃時，相應水化體系的施工性能和力學強度較優。采用XRD、DTA/TG、FTIR法分析各再加工熱處理石膏水化體系的水化過程發現，二水石膏為各體系中主要的水化產物，且隨著石膏再加工溫度的不同，各項微觀性能測試特征也有所不同，其結果體現與宏觀力學強度的變化規律一致。 Abstract：Flue gas desulfurization gypsum from a power plant in Jiangyin was processed by heat treatment, and the strength and setting time of hydration system with heat-treated desulfurization gypsum were studied. The results show that when the processing temperature is up to 150℃, construction performance and mechanical strength of the corresponding hydration system are better. By using the analyze methods of XRD, DTA/TG and FTIR, hydration process of hydration system with heat-treated gypsum can be determinated, and it can be shown that hydration product of the waste gypsum is mainly dihydrate gypsum. With the changing of processing temperature of the waste gypsum, the micro performances of hydration system are different, and the change law is in accordance with that of mechanical property.

鐵尾礦建筑砂漿的應用特性研究

李曉光，景帥帥，馬玉平

２０14年第8期

摘要

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摘??要：將鐵尾礦砂代替天然河砂制備水泥砂漿，通過測試其漿體性能、力學性能、耐久性能等指標，分析了鐵尾礦水泥砂漿的材料特性。試驗結果表明，在相同配合比條件下，鐵尾礦砂漿比天然河砂砂漿流動性降低，而表觀密度、抗壓強度和彈性模量更高。水養條件下，鐵尾礦砂漿發生膨脹，而天然河砂砂漿收縮。自然干燥狀態下，兩類試件均發生明顯收縮現象。50次凍融循環及酸、堿溶液浸泡下，鐵尾礦砂漿表現出較好的抗凍性和耐酸堿侵蝕性。隨鐵尾礦中可磁選顆粒含量增加，鐵尾礦水泥膠砂試件早期力學性能提高，28d齡期時則降低。28d齡期時不含可磁選顆粒的鐵尾礦水泥膠砂試件具有更高的無害孔含量，有利于提高力學性能。Abstract:Ironoretailingssand(IOTS)wasusedtopreparecementmortarbyreplacingnatureriversand,andmortarpropertiessuchasstrengthsanddurabilityweretexted.Theresultsshowthatapparentdensity,compressivestrengthandelasticmodulusofIOTSmortarmadebythesamemixproportionaregreaterthanthatofnatureriversandmortarexceptforlowerfluidity.SizeexpansionofIOTSmortaroccurscomparedtosizeshrinkageofnatureriversandmortarunderwatercuring,howeversignificantsizeshrinkageoccurstobothofmortarsundernaturaldrying.IOTSmortarcanstanddeteriorationof50freeze-thawcyclingandhavegreatacid-alkalicorrosionresistant.WithincreasingofmagneticgranulescontentinIOTS,mechanicalpropertiesofmortarsinearlyperiodincrease,but28dstrengthofmortarsdecreases.IOTSmortarsexcludingallmagneticgranulesareadvantageoustothemechanicalpropertyduetohighamountofharmlessporesat28days.

鋼渣粉取代礦渣粉配制水泥混凝土的試驗研究

韓長菊1，張育才1，周惠群1，宋華2，施紹云1

２０14年第8期

摘要

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摘要：在采用礦渣粉和粉煤灰復摻的基礎上，以鋼渣粉等比例取代礦渣粉，研究鋼渣粉對混凝土工作性能、抗壓強度、劈裂抗拉強度、微觀結構和水化產物的影響。結果表明，鋼渣粉與礦渣粉復摻有利于提高混凝土的流動性、抗壓強度和劈裂抗拉強度，摻鋼渣粉混凝土微觀結構致密，鋼渣粉水化速度介于礦渣粉和粉煤灰之間。 Abstract: Based on the double mixing of the fly ash and slag powders, the influence of steel slag powder on the working performance, compressive strength, splitting tensile strength, microstructure and hydration products of concrete are studied by replacing slag powders with an equal proportion of steel slag powder. The results show that the double mixing of the fly ash and slag powders can improve the liquidity, compressive strength and splitting tensile strength of concrete. The microstructure of concrete with steel slag powder is compact. The hydration speed of steel slag powder is between that of slag powder and fly ash.

無粘結預應力懸挑梁構件施工技術

張永軍1，俞月紅1，竺白川2

２０14年第8期

摘要

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摘要：以浙江移動杭州分公司營業中心項目主體結構3.6m預應力梁懸挑結構為例，介紹了采用低松馳高強鋼鉸線解決懸挑結構的配筋問題。施工中采用性能優良的QM錨具和QMJ擠壓錨具，保證了工程質量，提高了層高的凈空問題，滿足了項目的實際需求。 Abstract: Taking the main structure prestressed beam with 3.6m long cantilever structure of the Zhejiang mobile Hangzhou branch business center project as an example, using low relaxation and high strength steel hinge line to solve some reinforcement problems of cantilever structure are introduced. It’s indicated that using QM anchorage and QMJ extrusion anchorage with excellent performances can ensure the engineering quality, improve the height clearance problems and meet the needs of the project in the construction.

丹江口庫區某橋梁0#塊混凝土局部缺陷的處理分析

朱紅章，杜厚磊，楊旭

２０14年第8期

摘要

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摘要：依托南水北調丹江口庫區某預應力連續橋梁工程，通過分析橋梁1#墩0#塊混凝土形成的缺陷原因，進行結構計算與檢驗，并提出相對應的有效解決方案。 Abstract: The reasons for concrete defect are analyzed based on No.0 bridge block of a prestressed continuous girder bridge in the Danjiangkou reservoir of South-North Water Transfer Project. The structural calculation and tests are done, and effective solutions are put forward.

建設工程行業標準JGJ/T 308-2013《磷渣混凝土應用技術規程》編制簡介

許國偉1，鄧崗1，余明坤1，邱成江1，范宗凱2，鐘玲2

２０14年第8期

摘要

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摘要：介紹了新發布實施的行業標準JGJ/T 308-2013《磷渣混凝土應用技術規程》的編制背景、目的及意見，并對該標準的主要條文作了解釋和說明。 Abstract：The compilation background, purpose and signification of industry standard JGJ/T 308-2013 Technical specification for application of phosphorous slag powder concrete which has published and implemented are simply introduced. And the main compiled items of the standard are introduced and explained.

膨脹珍珠巖保溫材料制備中存在問題分析

馮新華1，王世香1，鄒法俊2

２０14年第8期

摘要

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摘要：分析了膨脹珍珠巖生產的基本原理，探討了溫度、顆粒分布等因素對膨脹珍珠巖生產過程及產品質量的影響。通過分析研究認為，溫度和顆粒分布是保證膨脹珍珠巖質量的決定性因素，風量等則是影響產品質量的重要因素。 Abstract: The basic principle of the expanded perlite production is analyzed, and the influences of temperature, size distribution etc. on the production process and quality of expanded perlite are discussed. Through the analysis and research, it is indicated that temperature and size distribution are the decisive factors ensuring the quality of expanded perlite, and the quantity of air is the important factor influencing the quality of expanded perlite.

水鎂石纖維保溫砂漿研制

溫久然，劉開平，張丹妮，耿飛，孫志華，關博文，楊云云

２０14年第8期

摘要

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摘??要：采用正交試驗的方法研究了以水鎂石纖維為增強材料的新型外墻保溫砂漿制備工藝技術問題。研究發現，纖維規格對砂漿抗壓強度、抗折強度及密度均有較大影響，珍珠巖用量對砂漿導熱系數影響最大，而纖維用量是線收縮率的主要影響因素。水鎂石纖維保溫砂漿的最佳水平搭配為：珍珠巖用量為水泥量的1.1倍，采用X規格纖維，纖維用量為水泥量的4%。在研究的三個規格水鎂石纖維中，X型的纖維對砂漿的強度最有利，對應的砂漿流動性較大，砂漿硬化體密度也較大，線收縮率最小。隨纖維用量增加，砂漿的強度和導熱系數增加，干密度先上升后下降，線收縮率先減小后增加。隨珍珠巖用量增加，砂漿的強度和導熱系數降低，線收縮率增加，干密度先下降后上升。纖維規格對砂漿性能的影響與纖維的長度分布有關，纖維過長或過短，均不利于纖維對砂漿增強作用的發揮。Abstract:Adoptedthemethodoforthogonaltest,themanufactureprocessandtechnologyofanew-typeinsulationmortarwhichisusedthebrucitefiberasareinforcingmaterialarediscussed.Theresearchindicatesthatfibertypeshavegreaterimpactonmortarcompressivestrength,flexuralstrengthanddensity,perlitedosageisthebiggestinfluenceonmortarthermalconductivity,andthefibercontentisthemainfactoraffectingthelinearshrinkagerate.Theappropriatemixofthebrucitefiberinsulationmortar:perlite-to-cementratiois1.1,X-typefiber,andthefibercontentofcementvolumeis4%.Intheresearchofthethreetypesbrucitefiber,Xfiberismostfavorabletomortarstrength,thecorrespondingmortarfluidityisgreat,bulkdensityisalsobiggerandthelinearshrinkagerateisminimum.Withthefiberdosageincrease,thestrengthandthermalconductivityincrease,drydensityfirstincreasesandthendecreases,linearshrinkagefirstdecreasesandthenincreases.Withtheperlitedosageincrease,thestrengthandthermalconductivitydecrease,linearshrinkageincreases,drydensityfirstdecreasesandthenincreases.Fiberlengthgreatlyinfluencesonmortarperformances:toolongortooshortfiberarenotconducivetoitsreinforcedroleonmortar.

環體內模輕質樓板結構布置及基本性能

張大英1，王樹明2，王錄民3

２０14年第8期

摘要

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摘要：以廢舊聚苯乙烯泡沫塑料顆粒制成的各向同性圓環體型塊作為樓板芯體材料，定義型塊與樓板長邊靜距和短邊靜距為不變參數，樓板兩個方向型塊間現澆混凝土肋寬和混凝土體積置換率為可變參數，設計了六組不同結構布置填充板梁支撐體系的數值算例，并進行了有限元分析。數值模擬結果表明，可變參數的變化對結構變形和應力分布規律的影響不大，對節點應力值大小較變形值大小影響顯著，在相同混凝土體積置換率情況下，增加樓板長向混凝土肋寬有利于結構整體變形。 Abstract: To take isotropic torus blocks made by disused polystyrene foam plastic particle as the core material of the floor, to define the distance between blocks and the floor edges in the long side and short side as invariant parameters, and also to define cast-in-situ concrete rib width in the two sides and the volume replacement rate as variable parameters, the six different numerical examples of the filled floor supported with beams are designed, and they are analyzed by the finite element method. The numerical simulation results show that the distribution laws of the deformation and stress are hardly influenced but have a significant impact to stress values compared with deformation values, in addition, with the same concrete volume replacement rate, it’s more conductive to the integral deformation to enlarge concrete rib width in the long side.

蒸壓粉煤灰加氣混凝土復合砌塊力學性能試驗研究

馬欣，張澤平，杜薇

２０14年第8期

摘要

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摘要：蒸壓粉煤灰加氣混凝土復合砌塊是一種熱工性能良好的非承重墻體材料。本文對其力學性能進行了試驗研究，試驗結果表明，蒸壓粉煤灰加氣混凝土復合砌塊的整體抗壓強度、內葉塊抗壓強度及沿塊體厚度方向的連接強度滿足相關規范要求，且受拉時最易破壞的是聚苯板與砌塊交界處的聚合物粘結砂漿，作為保溫層的聚苯板的表觀密度與壓縮強度滿足相關規范要求。 Abstract: Autoclaved fly-ash aerated concrete composite block is a non-bearing wall material with good thermal performance. Its mechanical properties are tested in this paper. The test results show that the overall compressive strength, the leaf blocks compressive strength and the connection strength along the thickness direction of autoclaved fly-ash aerated concrete composite block can meet the relevant regulatory requirements. It would damage most easily in the junction of polystyrene board and polymer adhesive mortar when tensioned. As insulation, the apparent density and compressive strength of polystyrene board can meet the relevant regulatory requirements.

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