共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
《中国耐火材料》2008,(4)
China's Output of Primary Magnesium During Jan.to Aug.According to the statistical data from China Nonferrous Metals Industry Association,during January to August of 2008,China's primary magnesium output is 448.9 thousand tons,increasing 16.8% year on year.Output of each area increased differently:Shandong,Shaanxi and Ningxia are 238.5,60.3 and 48.9 thousand tons,increasing 4.44%,55.41% and 22.63%,respectively. 相似文献
3.
《中国耐火材料》2008,(3)
About 1/3 Increase of China's Ceramic Production CostIt was reported by Foshan Ceramics Industry Association that, due to price rising of raw materials and crude oil, and short electric supply, the procurement cost of ceramic enterprises increased about 1/3. Due to high production cost, some ceramic enterprises in Fujian and Yunan stopped production. 相似文献
4.
5.
6.
7.
8.
9.
我国经济高速、稳定的发展和实力的增强,给我们尽快融入全球经济的大环境创造了前所未有的大好机遇。现在我国处于工业化发展的关键时期,系统吸取发达国家的经验教训,必须从传统工业文明向生态工业文明转变,才能保持可持续发展。所以,党中央,国务院提出的坚持“以人为本,全面、协调、可持续发展”的发展战略是适时的,非常必要的。 相似文献
10.
《Drying Technology》2013,31(1-2):305-315
Abstract Moisture is one of the most deteriorating factors of buildings. The deteriorating effect of moisture occurs mainly during the drying phase, not in the wetting phase. Environmental factors, such as air temperature, air humidity, and air velocity affect drying. An experimental air dryer of controlled drying air conditions was used to investigate the drying performance of 4 stone materials, 2 bricks, and 6 plasters. Drying kinetics was examined at 3 air temperatures, 5 air humidities, and 3 air velocities. A first-order kinetics model was obtained in which the drying time constant was a function of the drying conditions, and the equilibrium material moisture content was described by the modified Oswin equation. The parameters of the proposed model were found to be affected strongly by the material characteristics. 相似文献
11.
1产品简介 硅酸钙制品是一种新型的建筑材料,主要由硅质材料和钙质材料在高温高压下,加入适量增强材料及反应助熔剂后发生一系列的化学反应而制成的,具有质轻、高强、阻燃、耐火、绝热、保温和可锯、可钻等易加工性能,是代替传统水泥胶凝材料和木材的一种新型胶凝材料,广泛用于锅炉、化工管道保温、火力发电、工业用干燥炉等设备的炉壁,还可用于结构钢梁的耐火盖板,宾馆、大厦等地下建筑的耐火、吸音墙面、顶棚、内外墙装饰板、船用隔墙材料等,其性能是硬质块状保质材料中使用温度最高、容重最轻、性能最优的一类材料. 相似文献
12.
13.
14.
Katsuhiko Ariga Qingmin Ji Jonathan P. Hill Ajayan Vinu 《Journal of Inorganic and Organometallic Polymers and Materials》2010,20(1):1-9
Inorganic materials of nanometric dimensions and controllable morphologies are now widely available permitting their use as building blocks in supramolecular structures. Incorporation of inorganic blocks into hybrid structures can yield unique materials that have no naturally occurring or organic synthetic analogues. In this short review, we describe the construction and functions of supramolecular materials prepared using inorganic building blocks, with emphasis on material-like components. Examples described in this review are categorized as (i) inorganic structures within organic assemblies (silica-supported Langmuir monolayers, organic–inorganic lipid bilayer vesicles etc.), (ii) organic components in inorganic nanospaces (mesoporous materials including biocomponents such as peptides and proteins), (iii) organic/inorganic nanohybrid blends (nanorod-liquid crystal blends and surfactant-guided gold nanostructures), and (iv) hierarchic structures (layer-by-layer assemblies of mesoporlous carbons and capsules). 相似文献
15.
综合介绍了比利时根特大学Magnel实验室与其他合作单位关于微生物与建筑材料(混凝土和石材)之间相互作用的研究概况。第一个研究课题是生物硫酸腐蚀,主要研究混凝土下水道系统和储肥设施的侵蚀。整个过程可用纯化学或微生物侵蚀实验来模拟。利用化学硫酸实验来模拟侵蚀过程的缺点是忽视了混凝土本身的杀菌效果。微生物实验结果表明使用具有高度中和能力的材料可限制生物腐蚀的发生。因此,生物硫酸侵蚀模型中不但需要考虑耐久性(如孔隙率),也需要把混凝土碱性列为参数之一。第二个研究课题是细菌在胶结固化和混凝土自修复中的应用。细菌诱导产生的碳酸钙用于水泥基材料和石灰石的表面防护。研究表明:沉积在表面的生物碳酸钙可有效降低混凝土吸水率、碳化和氯离子侵蚀;还能提高混凝土抗冻融性能。多孔石灰石表面固化深度可达到30mm甚至更多,固结区的强度可增加300%。与此同时,微生物碳酸钙也被应用于混凝土裂缝自修复。细菌先被固载于硅藻土或微胶囊内,然后加入到混凝土中与其一起搅拌。结果显示:加有硅藻土固载的细菌的砂浆试块上0.15~0.17mm宽的裂缝可在40d内被细菌诱导产生的碳酸钙完全修复;而加有微胶囊固载的细菌的试块上1mm宽的裂缝可以在3周内自修复完毕。微生物在混凝土中的另一个应用是创造绿色生态混凝土墙壁。这种混凝土墙壁经过特殊设计获得特定的微观结构和生物兼容性,从而可充当生物生长的基体。为了适于生物生长,使用低pH值的磷酸镁水泥混凝土和碳化水泥混凝土,并对其他影响生物兼容性的因素如混凝土孔隙率、表面粗糙度等进行了优化研究。 相似文献
16.
本文介绍了高值利用粉煤灰生产新型建筑材料。国家发明专利:“粉煤灰烧结承重型多孔砖和非承重型空心砖”,其专利号为:ZL98100704.X“粉煤灰制彩色步道板”其专利号为98100705.8,专利技术后续发展项目:“粉蒌灰非承重小型空心砌块。” 相似文献
17.
新型建筑防水材料中的高分子制品及其发展趋势 总被引:3,自引:0,他引:3
我国的建筑物存在着严重的渗漏顽症,不仅建筑物的屋顶、地下室需要防水,在隧道、涵洞、桥梁、机场跑道、水库、贮水池、垃圾场、水渠等设施中,均需要设置防水隔离层,都离不开防水材料。近年来我国的防水材料得到了长足的发展,本文着重介绍近几年发展较快的新型高分子防水材料。 相似文献
18.
《Drying Technology》2013,31(1-2):289-303
Abstract: Moisture is one of the most deteriorating factors of buildings. The masonry moisture content depends on hygroscopic equilibrium between building materials and environment. Moisture sorption (adsorption and desorption) isotherms of 4 sandstones, 2 bricks, and 6 plasters were determined at 15, 25, and 35°C. A modified Oswin equation was used to predict experimental data for water activity in the range between 0.03 and 0.90. The hysteresis phenomenon between adsorption and desorption was observed for all the examined materials and classified at various isotherm types. A correlation of the hysteresis type with the microstructural characteristics of the materials was attempted. 相似文献
19.
复合材料在城市建设中应用越来越广。简要介绍了桥梁防腐、碳纤维、玻璃纤维、涂料、胶粘剂、加气混凝土等在城市建设中的应用。 相似文献