建筑工程材料 Construction Engineering Materials-砌筑砂浆 Masonry Mortar-1762237695053.pptxVIP

;;;;挡土墙的砌筑

Masonryconstructionofretainingwalls;学校新校区宿舍楼的框架砌体填充墙

Framemasonryinfillwallsofdormitorybuildingsinthenewcampusoftheschool;砂浆的概念

ConceptofMortar

砂浆是由胶凝材料、细骨料和水按适当比例配制而成的建筑材料。为改善砂浆的和易性，可掺入适量的外加剂和掺合料。

Mortarisabuildingmaterialcomposedofcementitiousmaterials,fineaggregates,andwatermixedinappropriateproportions.Toimprovetheworkabilityofmortar,appropriateadditivesandadmixturescanbeadded.;;水泥

Cement;1.流动性。

Flowability.;测定砂浆流动性时先将被测砂浆均匀的装入砂浆流动性测定仪的砂浆筒中，置于测定仪圆锥体下，将质量为300g的带滑杆的圆锥尖与砂浆表面接触，然后突然放松滑杆，在10s内，圆锥体沉入砂浆中的深度值即为沉入值。

Whenmeasuringtheflowabilityofmortar,themortarundertestisuniformlyplacedintothemortarcylinderofthemortarflowabilitytester,placedundertheconeofthetester,andaconetipwithamassof300gandaplungerisbroughtintocontactwiththemortarsurface.Then,theplungerissuddenly;在选用砂浆的稠度时，应根据砌体材料的种类、施工条件、气候条件等因素来决定，可按表5-1选取。

Whenselectingtheconsistencyofmortar,itshouldbedeterminedbasedonfactorssuchasthetypeofmasonrymaterial,constructionconditions,climate,etc.RefertoTable5-1forselection.;砂浆的保水性用保水率表示，用保水性试验测定。

Thewaterretentionofmortarisrepresentedbythewaterretentionrate,whichisdeterminedbythewaterretentiontest.;试验时使用的仪器和材料有：内径100mm，高25mm的圆环试模、0.045mm滤网、15张滤纸、2kg重物、底部不透水片、烘箱等。通过试验

Theinstrumentsandmaterialsusedinthetestinclude:aringmoldwithaninnerdiameterof100mmandaheightof25mm,a0.045mmmeshsieve,15piecesoffilterpaper,a2kgweight,anon-permeablebottomplate,anoven,etc.Passingthetest

保水率=

Waterretentionrate=

;通常水泥砂浆保水率要≥80%，水泥混合砂浆要≥84%，预拌砂浆要≥88%

Typically,thewaterretentionrateofcementmortarshouldbe≥80%,cementmixedmortarshouldbe≥84%,andpre-mixedmortarshouldbe≥88%.;二是砂浆强度与强度等级

Thesecondaspectismortarstrengthand

strengthgrade.;测定砂浆抗压强度的标准试件是边长为70.7mm的立方体试件，一组６块，标养至28ｄ，测定其抗压强度平均值。

Thestandardtestspecimenformeasuringmortarcompressivestr