苏州建成首个规模化蒸压灰砂（粉煤灰）砖企业

本刊讯 近日．苏州昆山市玉山镇建成首个规模化蒸压灰砂（粉煤灰）砖企业——昆山市成基新型建材有限公司。该公司投资3000万元建成4条蒸压灰砂砖生产线．利用河砂、粉煤灰、炉渣等生产蒸压灰砂（粉煤灰）砖．年产标砖1．6亿块。产品品种有蒸压灰砂砖、蒸压灰砂空心砖、蒸压粉煤灰砖、蒸压粉煤灰多孔砖等。     

新型建材之“蒸压灰砂多孔砖”

<正>蒸压灰砂多孔砖是以石灰为钙质材料,(尾矿)砂、石粉为硅质材料,经原料制备后压制成型,再经高压蒸汽养护而成。蒸压灰砂多孔砖的技术性能和质量标准符合国家《蒸压灰砂多孔砖》(JC/T637-2009)标准的要求。蒸压灰砂多孔砖主要用于建筑承重外墙的砌筑和框架的填充,是国家重点工业与民用建筑领域推广应用的新型墙体材料。其强度高、吸水率小、抗渗性强、密实度大、外观尺寸精确、蓄热能力显著,且隔音效果十     

《烧结保温砖和保温砌块》等5项国家标准审定会议在昆明市召开

<正>本刊讯2009年12月6～8日,由全国墙体屋面及道路用建筑材料标准化技术委员会组织的《烧结保温砖和保温砌块》、《烧结多孔砖和多孔砌块》、《透水路面砖和路面板》、《烧结路面砖》、《蒸压灰砂多孔砖》等5项国家标准审查会在云南省昆明市召     

非烧结多孔砖砌体强度估值模型及抗压强度研究

为了研究不同块型非烧结多孔砖砌体的抗压强度,通过试验研究,对Tasuji-Slate-Nilson破坏准则进行修正后,结合ANSYS有限元分析,得到了分析各种块型砌体抗压强度的理论模型。用该模型对各种块型砖砌体分析结果表明,块体原材料、几何尺寸和孔洞率对砌体抗压强度有明显的影响。在普通砖砌体抗压强度计算公式基础上,引入块型影响系数,得到了各种块型非烧结多孔砖砌体抗压强度计算公式。通过与493个蒸压灰砂多孔砖砌体、144个混凝土多孔砖砌体及30个蒸压粉煤灰多孔砖砌体抗压试验结果对比表明,计算公式的计算精度良好。     

解读GB 26541-2011《蒸压粉煤灰多孔砖》

通过对新的《蒸压粉煤灰多孔砖》标准学习理解,知道其与蒸压灰砂多孔砖,承重混凝土多孔砖标准的主要异同点,特别强调在做强度试验时,不要漏掉抗折试验。     

信息集萃

龙游县首家规模型非粘土类墙材企业投产浙江龙游县首家非粘土类墙材“蒸压粉煤灰砖、蒸压灰砂砖、多孔砖”生产线在龙游宏建新型建材有限公司投入试生产.目前日生产能力达18万块标砖。龙游宏建新型建材有限公司是龙游县宏建房地产集团于去年7月投资1200万元资金建设的,该公司利用本地区“石灰、细砂”资源,掺加40%的衢化粉煤灰、水泥厂下脚料、矿山石屑、煤渣等工业废料和建筑垃圾等固体废弃物为原料,引进4条国内先进的蒸压粉煤灰砖、蒸压灰砂砖生产线和1条蒸压灰砂多孔砖生产线。年生产能力可达5000万块标准砖。据估算,该公司的生产年消耗…     

《非承重蒸压灰砂空心砌块和蒸压灰砂多孔(空心)砖》征求意见稿

正1范围本标准规定了非承重蒸压灰砂空心砌块和蒸压灰砂多孔(空心)砖的术语和定义、分类、一般规定、技术要求、试验方法、检验规则及产品合格证、堆放和运输。本标准适用于工业与民用建筑等非承重结构部位用蒸压灰砂空心砌块和蒸压灰砂多孔(空心)砖。2规范性引用文件下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标     

产品技术

毛细管网换热器研发成功,浙江垃圾高温焚烧炉渣制砖,商洛利用金矿矿渣生产蒸压灰砂盲孔砖     

检测粉煤灰砖和蒸压粉煤灰多孔砖应注意的事项

粉煤灰砖按养护方法分为蒸压砖和蒸养砖,蒸压砖又分为蒸压粉煤灰实心砖和蒸压粉煤灰多孔砖,检测时涉及到两个产品标准,一个技术规程和两个方法标准,不同的标准要求、方法均有差别,不能混用。     

非承重蒸压灰砂空心砖干燥收缩率快速测试试验

<正>为方便厂家测试刚出釜的非承重蒸压灰砂空心砌块和蒸压灰砂空心砖试件的干燥收缩程度,我公司研究出一种适合厂家的干燥收缩率快速测试方法,试验架如图1所示。1试验样品2试验方法2.1试验试件《非承重蒸压灰砂空心砌块和蒸压灰砂多孔(空心)砖》征求意见稿,附录A。试验室温度控制在20℃±2℃,相对湿度控制在50%±10%(前期试验过程有偏差),采集频率为每半小时一次。     

提高蒸压灰砂砖质量的技术措施

采用最佳生石灰用量,加入废灰砂砖块,使用灰砂砖外加剂,并选择合理的成型压力、生石灰磨细度、蒸压养护制度,可显著提高蒸压灰砂砖质量。     

利用建筑垃圾制备新型高利废墙体砖

以建筑垃圾粉料、再生细骨料、电石渣、石灰为基本原料,引入改性剂S,采用蒸压养护工艺,制备承重墙体砖。结果表明:在合理的配料和养护工艺条件下,采用建筑垃圾粉料可完全取代水泥、石灰等胶凝材料,而再生骨料可全部取代砂粒;其中建筑垃圾粉料、再生骨料总用量可达到70%～80%,固体废弃物总用量达95%,制备的墙体砖强度达MU15级。     

Lime based steam autoclaved fly ash bricks

About 10 million tonnes of fly ash are produced yearly as waste from coal fired thermal power plants in Turkey. Only a small portion of this waste is utilized as a raw material in the production of cement and concrete. In this study, Seyitömer power plant fly ash was investigated in the production of light weight bricks. Fly ash, sand and hydrated lime mixtures were steam autoclaved under different test conditions to produce brick samples. An optimum raw material composition was found to be a mixture of 68% fly ash, 20% sand and 12% hydrated lime. The optimum brick forming pressure was 20 MPa. The optimum autoclaving time and autoclaving pressure were found 6 h and 1.5 MPa, respectively. The compressive strength, unit volume weight, water absorption and thermal conductivity of the fly ash–sand–lime bricks obtained under optimum test conditions are 10.25 MPa, 1.14 g/cm³, 40.5% and 0.34 W  m⁻¹ K⁻¹ respectively. The results of this study suggested that it was possible to produce good quality light weight bricks from the fly ash of Seyitömer power plant.     

Utilization of copper tailing for autoclaved sand–lime brick

The influences of the batch ingredients and the autoclaving processes on the properties of autoclaved sand–lime brick from low SiO₂ content copper tailing were studied. The results show that the copper tailing with low content of SiO₂ can be used to produce autoclaved sand–lime bricks meeting GB11945-1999 for Mu 15 sand–lime brick, if only the proportion of the copper tailing in the brick batch does not exceed 50% (% by mass) and appropriate proportions of river sand and sand powder are added to compensate for the low SiO₂ content. XRD and SEM analyses show that the main hydrothermal reaction products in the brick are 0.9 nm, 1.1 nm and 1.4 nm tobermorite phases, and the andradite in the copper tailing nearly does not take part in the autoclaving reaction.     

Engineering characteristics of the compressed-stabilized earth brick

Utilization of lime and rice husk ash for soil stabilization produced considerable strength gain and other geotechnical properties of the stabilized soils. Its application could be also superior for construction materials as compressed-stabilized earth (CSE) or unfired-brick. This paper presents the investigation result of the application of lime and rice husk for unfired brick or compressed stabilized earth. The compressive and three-point flexural strength tests including compressive strength after water submersion were carried out in this present study. The investigation results show that compressive and flexural strength of clay brick are improved by adding of lime and RHA. The best quantity of lime and RHA in this study, is obtained by ratio 1:1 of lime and RHA. The addition of sand in stabilized clay resulted in more improvement in the water retention ability.     

煤矸石多孔砖对建筑能耗的影响

多孔砖作为黏土实心砖的替代产品,可以提高砌筑墙体的热阻,加强围护结构的保温性能。以煤矸石为原料制作多孔砖,不仅可以消耗大量煤矿产煤废料,而且可增加多孔砖的强度。分析了煤矸石多孔砖对生产能耗、施工能耗、建筑能耗的影响,煤矸石多孔砖具有显著的节能效果。     

The use of brick–lime plasters and their relevance to climatic conditions of historic bath buildings

Brick–lime mortars and plasters have been widely used as water-proof materials in aqueducts, bridges and cisterns since early Hellenistic time. In this study, the characteristics of brick–lime plasters used in some Ottoman bath buildings were investigated in order to understand their relevance as plasters in hot and humid environmental conditions of the baths. For this purpose, basic physical properties, raw material compositions, mineralogical, microstructural and hydraulic properties of brick–lime plasters of some historic bath buildings in ?zmir (Turkey) were determined by XRD, SEM-EDX, AFM and chemical analyses. The results indicated that their survival without loosing their strength and adhesion in hot and humid conditions of the baths was explained by their hydraulic characters due to the consciously use of porous and pozzolanic crushed bricks as aggregate in the manufacturing of plasters.     

蒸压轻质加气混凝土(NALC)砌块的施工技术

轻质加气混凝土(NALC)砌块是以水泥、石灰、硅砂为原料,经过高温蒸养而制成的无放射性、无污染的多孔无机环保墙体材料,它具有轻质高强、优良的隔热保暖性、优良的耐火性、良好的抗冻性、优良的抗水渗透性、抗水软化性好、良好的隔音性能和加工性能。     

轻质烧结页岩砖石灰爆裂的研究

轻质烧结页岩砖与同属脆性墙体材料的烧结页岩砖有着相同的主要原材料,均不可避免存在石灰爆裂现象,使其力学等性能受到较大的影响。通过对原料的理化性能分析、石灰爆裂机理分析,以及石灰爆裂实验对比分析,得出石灰爆裂对轻质烧结页岩砖的影响轻于对烧结页岩砖的影响,说明砖内微孔的存在可以缓解石灰爆裂的影响。     

骨料种类对糯米灰浆性能的影响

采用灰浆性能表征并辅以扫描电镜(SEM)和X射线衍射(XRD)等技术手段,测定了制备的糯米灰浆的表面强度、抗压强度、抗冻性等性能,探讨了骨料的种类、粒径以及掺量对糯米灰浆性能的影响。结果表明:砖颗粒、河砂、石英砂3种骨料的掺入,使糯米灰浆的收缩性和抗冻性均得到较大改善。其中,砖颗粒骨料的加入使糯米灰浆的抗冻性较空白样品提高了125%;但随着骨料粒径和骨灰比的增大,掺入骨料糯米灰浆的抗压强度、抗冻性和收缩率呈下降趋势。因此,在砖石质文物的保护中,建议使用砖颗粒作为糯米灰浆的骨料,并将骨料粒径控制在3mm以下,骨料/灰的比值控制在2∶1以下,对改善糯米灰浆的性能效果最佳。