《烧结砖.ppt

3）欠火砖与过火砖 烧结砖的形成是砖坯经高温焙烧，使部分物质熔融，冷凝后将未经熔融的颗粒粘结在一起成为整体。当焙烧温度不足时，熔融物太少，难以充满砖体内部，粘结不牢，这种砖称为欠火砖。欠火砖孔隙率大，强度低，抗冻性差，外观颜色较浅，为有缺陷砖。 当焙烧温度过高时，砖内熔融物过多，造成高温下的砖体变软，此时砖在点支撑下易产生弯曲变形，这种砖为过火砖。它也属于有缺陷砖。欠火砖与过火砖均为不合格产品。 （2）外观质量 烧结普通砖的优等品颜色应基本一致，一等品和合格品颜色无要求。其他外观质量应符合表6—2的规定。 ２）烧结砖的石灰爆裂 有时生产烧结砖的原料中夹有石灰石等杂物，经焙烧后砖内形成了颗粒状的石灰块等物质。处于干燥条件下时，这些杂质不会影响砖的性能，一旦吸水后，就会产生局部体积膨胀，导致砖体开裂甚至崩溃。石灰爆裂不仅造成砖体的外观缺陷和强度降低，还可能造成对砌体的严重危害。 * 砌墙砖 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 这些是什么? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 什么叫砌墙砖? 以粘土,页岩,工业废料及其他地方资源为主要原料制成的砌筑墙体的砖 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 砌墙砖可分为哪几类? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 烧结普通砖的原料有哪些? 以粘土、页岩、煤矸石、粉煤灰为主要原材料 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 按原料不同可分为哪几种砖? 粘土砖(N),粉煤灰砖(F),页岩砖(Y)煤矸石砖(M) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 你看到的砖颜色上有何不同?形成原理上有何不同? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 阅读烧结普通砖的技术规定回答: 1.烧结普通砖的外形尺寸为多少? 2.烧结普通砖按_______划分为5个等级,即MU30,MU25,MU15,MU10 240mmx115mmx53mm 抗压强度 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. ３．强度和抗风化性能合格的砖按＿＿＿＿．＿＿＿．＿＿＿＿＿划