新型建材推介

花岗岩仿石涂料花岗岩仿石涂料（真石漆）以自然界中天然岩石为原料，参照各种花岗岩石结构特征，添加进口化学助剂，以特殊工艺配制而成，涂层酷似天然花岗石，具有强烈的岩石质感，形态逼真，色调柔和，达到以涂料代替天然石材，创造良好装饰效果的目的，同时，可有效保护基材不受侵蚀，提高外保温层抗撞击强度。高级弹性防水涂料该产品是精选美国进口的自交联型丙烯酸聚合物配制而成的一种具有弹性功能的外墙装饰涂料。具有独特的弹性功能和防水功能，已广泛应用在美国各种建筑外墙装饰。该涂料的外观装饰效果与普通乳胶漆一致。涂层厚度…     

建筑外墙复合型质感涂料的制备与应用

质感涂料以改性有机硅丙烯酸聚合物乳液复合部分弹性乳液为基料,天然石英砂为主要填料,辅以纳米二氧化硅、纳米抗污助剂、空心玻璃微珠、反射隔热粉、多功能助剂等制备而成,具有抗污、耐候、超耐久及反射与阻热等性能,外观上形象逼真、高贵质感、色彩丰富、施工简洁,是一种最新型多功能、高性能、高装饰性建筑外墙涂料。     

弹性质感涂料叠影法施工技术

介绍了弹性质感涂料的性能,从基层处理、底漆涂刷、白色英米砂质感涂料叠影施工、产品保护等方面,阐述了弹性质感涂料叠影法施工技术,并提出了施工质量控制措施,有助于促进该技术的推广应用。     

建材信息

建材信息高级碎石涂料最近，国内推出一种碎石涂料，不仅具有天然石材的质感，更可满足建筑物配色的要求。这种涂料是以精选的天然色砂，花岗岩、石英砂等碎石按不同粒径的要求破碎、筛选后、加人特殊配制的树脂调制而成。由于具有天然石材的质感，永不褪色，加上施工简易...     

仿砖弹性质感涂料施工工艺及注意事项

本篇文章对大量工程实例进行了总结,并且全面详细的介绍了仿砖弹性质感涂料进行施工过程中的特点,并且对仿砖弹性质感涂料施工技术中必须要协作配合的部分进行了阐述,以期为其它建筑工程建设过程中提供参考.     

意大利推出花岗岩碎石涂料

意大利一家公司推出了一种花岗岩碎石涂料,它不仅具有天然石材的质感,而且永不褪色,可满足建筑物配色的需求。 这种涂料是将花岗岩碎石按不同粒径的要求碾碎、筛     

外墙真石漆质量通病及防治对策

外墙真石漆是以天然花岗岩等天然碎石、粉料为主要原材料,以合成树脂乳液为胶粘剂,并辅以多种助剂配制而成的涂料。它具备天然石材的丰富质感、立体感,以及具有庄重、和谐之美感。它与外墙面砖、干挂花岗岩相比,更具价廉物美之经济适用性,装饰效果堪比石材,又比石材更适合塑造各种艺术造型,耐久性及抗渗性更持久,故颇受建筑市场欢迎。由于受配料的人为因素、技术因素以及     

花岗碎石涂料

意大利一家公司推出一种花岗碎石涂料,它不仅具有天然石材的质感,而且永不褪色,可满足建筑物配色的需求。 这种涂料是将花岗碎石按不同粒径的要求碾碎、筛选,经防止风化处理后,加入特殊配制的树脂调制而成。该涂料可涂于混凝土、木材、石材、轻质砖、石膏板等表面,适用于大楼内外墙、窗框、阳台、圆柱等建筑。     

走俏市场的新型涂料和壁纸

新型涂料:环保调湿涂料这种涂料是以吸水树脂为主要成膜物,配以各种特色粉料调制而成的一种功能性涂料,具有特殊的调湿功效。丝绸幻彩涂料丝绸幻彩涂料具有无毒、附着力强、耐水、耐擦洗的特点,通过喷涂施工,可形成丝绸般华丽的质感效果。环保灭虫乳胶漆环保灭虫乳胶漆遮盖率高,附着力强,耐水、耐擦洗,涂层光洁滑腻,高雅华贵,装饰效果突出,同时还有独特的灭虫功效。珍珠涂料这是一种装饰效果酷似天然珍珠镶嵌的高档装饰材料。这种装饰材料的耐磨性能极好,颗粒不易脱落,并且具有优异的防潮、防渗漏功能。高性能液体瓷这种涂料亮度如瓷,韧性似…     

质感涂料外墙仿砖施工中常见问题解决方案分析

<正>质感涂料在现今的建筑物装修过程中有较多的应用,本文主要介绍的是质感涂料的概念特点、外墙仿砖施工的工序以及质感涂料外墙仿砖施工中常见的问题及解决方法。质感涂料的起源来自于西纳半岛,在国外的建筑物表面运用的非常多。我国运用质感涂料是近年国内厂商在国外进口的,当质感涂料引用到我国时使得国内建筑业受到较大的轰动。质感涂料以其立体化的纹路、逼真的效果以及较轻的自重赢得国内建筑行业广泛的好评。现今的建筑行业发展非常迅速,传统的外墙施工大多是采用瓷砖或者     

Critical Factors in Financing and Management of Light Rail Transit Systems： Delphi Methodology Approach

In recent years, a large number of LRT （light rail transit） networks and tramways have been built in Spain using the tender system. The rhythm of construction has been such that very few analyses have been carried out and those that have were only partially done because the main participants involved had ulterior motives which impeded their having a critical and independent opinion of the projects carried out. Within this framework, the Delphi methodology presents itself as a very useful instrument, as the intrinsic advantages that it has added to the characteristic that the experts who participate in the project can remain anonymous without detracting value from the conclusions obtained as these are grouped together according to their worth.     

Unanticipated Bond Failure over Supporting Band Beams in Grouted Post-Tensioned Slab Tendons with Little or No Initial Prestress

After grouting the ducts in a large band beam and one-way slab post-tensioned floor system in a large shopping mall （in excess of 1.5 km2 in plan）, doubts arose concerning the level of initial prestress and the strength and serviceability of the slabs was questioned. To assess the strength of the slabs, it was assumed, as a worst case scenario, that some spans may have been constructed with zero initial prestress. Load tests on prototype specimens, with similar dimensions and reinforcement quantities as the floor slabs, were performed to assess the stress development in initially unstressed, but fully grouted, tendons. Unexpected bond failures occurred at the junctions of slab and band beam where the abrupt change in section depth caused a sudden change in tendon stress. The maximum stress that was developed in the initially unstressed tendons at these locations was about 60% of the strength of the tendons.     

Infilled Reinforced Concrete Beams for Sustainable Construction

This paper presents a study carried out on infilled reinforced concrete beams for sustainable construction. In reinforced concrete beams, less stressed concrete below neutral axis can be replaced by some light weight material to reduce the weight of the structure and also achieve the economy. The used infilled material is brick. Sustainability can be achieved by replacing the partially used concrete. By saving concrete, the authors save cement, which reduces the green house gases emissions. So it is considered as environment friendly. Since infilled beam acts like a layered member, there needs a theory to analyze it. Method of initial functions is used for the analysis of the infilled RC （reinforced concrete） beams. This method is successfully applied on infilled beam. Results show that physical conditions are verified for infilled beam.     

Flexible Pavement Design Simulation Using Mechanistic-Empirical Pavement Design Guide

The KDOT （Kansas Department of Transportation） is currently adopting MEPDG （mechanistic-empirical pavement design guide） to replace the 1993 AASHTO （American Association of State Highway and Transportation Officials） design method. The main objective of this study was to compare flexible pavement design using 1993 AASHTO design guide and MEPDG. Five newly built Superior PERforming Asphalt PAVEments （Superpave）, designed using the 1993 AASHTO Design Guide, were selected as test sections for the design simulation study. Deflection data were collected approximately 8 to 10 weeks after construction using FWD （falling weight deflectometer）. The FWD deflection data were used to back-calculate the pavement layer moduli using three different back-calculation programs. The existing pavement structures were analyzed for a 10-year analysis period. The maximum numbers of years the existing pavement structures will be in a serviceable condition as well as the minimum thicknesses of different layers to serve for 10-years were also determined. Effects of changing subgrade modulus, target distress, and reliability were also investigated. The MEPDG design analysis shows that the 1993 AASHTO Guide-designed flexible pavements do not show the distresses currently observed in Kansas for the 10-year design period. The MEPDG design simulation shows that the thinner the pavement sections, the higher the permanent deformation. The existing pavement structures can serve for more than 20 years as per the MEPDG design analysis if the default failure criteria and nationally-calibrated models are used.     

Economy of RHA （Rice Husk Ash） in Concrete for Low-Cost Housing Delivery in Nigeria

Delivery of housing units in adequate quantity and quality has been the pursuits of individuals and successive governments in Nigeria. Still, the gap between demand and supply is becoming wider on daily basis due to exorbitant cost of building materials that is beyond the reach of average Nigerians. Concrete being the most acceptable construction material is expensive due to high cost of cement. Efforts made to reduce the cost of cement were to no avail, thus there is need to look elsewhere. Past researches showed that substituting cement with 15% of RHA （rice husk ash） in concrete improves the performance of concrete and reduces global warming as a result of emissions from cement production. This paper looks into the effect of using RHA as partial substitute of cement on the cost of a low-cost housing unit. Results showed that cement based construction materials are responsible for 82.58% of the total cost in which cement is responsible for 42%. When 15% RHA was used to substitute cement over N90,000 was saved, amounting to about 7% of the total cost of the building. In addition, depletion of natural resources was reduced.     

Bending Stresses of Steel Web Tapered Tee Section Cantilevers

Although commonly used, no design method is available for steel web tapered tee section cantilevers. This paper investigates the bending stresses of such beams. Relationships between the maximum compressive stress and the degree of taper were investigated. An analytical model is presented to determine the location of the maximum stress when subjected to a uniformly distributed load or a point load at the free end and was validated using finite element analysis and physical tests. It was found that the maximum stress always occurs at the support when subjected to a uniformly distributed load. When subjected to a point load at the free end and the degree of taper is up to seven, it was found that Miller＇s equation could be used to determine the location of the maximum stress. However, it is shown that when the degree of taper is greater than seven, Miller＇s equation does not accurately predict the location and the analytical model should be used. It was also found that the location of the maximum stress was solely dependent on the degree of taper, while a geometric ratio, fl was required to determine the magnitude of the maximum stress. A simple method that predicts the magnitude of the maximum stress is proposed. The average error in the prediction of the magnitude of the maximum stress is found to be less than 1.0%.     

Probabilistic Seismic Hazard Assessment for Bridgetown-Barbados,Employing Subduction Interface Characteristic Earthquakes

A new probabilistic seismic hazard analysis was performed for the city of Bridgetown, Barbados, West Indies. Hazard computations have been performed using the standard Cornell-McGuire approach based on the definition of appropriate seismogenic sources and expected maximum magnitudes, the authors take into consideration the possibility of large subduction interface earthquakes of magnitude 8.0-9.0 beneath the Barbados accretionary prism via application of a characteristic model and slip rates. The analysis has been conducted using a standard logic-tree approach. Uniform hazard spectra have been calculated for the 5% of critical damping and the horizontal component of ground motion for rock site conditions setting 5 return periods （95, 475, 975, 2,475 and 4,975 years） and spectral accelerations for 34 structural periods ranging from 0 to 3 s. The disaggregation results suggest that the magnitude-distance pair that dominates the hazard yields M 7.4 and 8.6 and a distance of 42.5 km in the Interface Subduction Zone beneath Barbados for the 475 and 975 years RP （return period）, respectively. An event with an M 8.0 at a distance of 107.5 km in the Intraplate Subduction Zone is the second scenario that dominates the hazard for both 475 and 975 years RP.     

地下室外墙型钢三角架单侧支模施工技术

北京金融街E10项目地下4层(地下四层~地下二层层高均为3.7 m,地下一层层高为5.1 m),地上10层,结构形式为框架-剪力墙结构;建筑面积25992 m2,基坑深17.760m,建筑檐高45.000m。本工程场地狭小,地下室东侧外墙距红线1.15~1.7m,南侧外墙距红线0.6~0.7 m,西侧外墙距红线0.56~6.7 m,北侧围墙距红线     

Social Participation in the Context of the Urban Public Space Renewal： The Case of Lagarteiro Neighborhood in Oporto

In 1980, Giancarlo de Carlo wrote in the Perspecta： Yale Journal, ＂An Architecture of the Participation＂. Carlo, proposed a sequence of procedures： the problem definition, the solution and the results evaluation, in all the three steps, the social communities should be integrated in as part of a share and dynamic process. This text corresponds to a new way of understanding the importance of the social communities in the architecture definition. From de Carlo＇s text, the main goal of this paper is to present the results of an intervention in public space renewal of the Lagarteiro neighborhood （in Oporto city） and the relation of this process with the participation of the resident population. The urban context of Lagarteiro＇s neighborhood presented before the intervention the typical and classic signs of disqualification of environmental and urban peripheral areas of resettlement. The term ＂disadvantaged areas＂ is associated with these areas in urban or peri-urban case, was framed in a specific Portuguese policy, called Initiative Critical Neighborhoods. Being a recent intervention, the renewal of the public space in Lagarteiro is a complete case study that allows comprehending the participation phenomenon in nowadays, at the same time that seduces a reflexion about technical and architectural solutions for ＂critical＂ neighborhood.     

Use of Geophysical Techniques for the Localization of the Restricting Zones of Permeability in the Bottom of Basin： Forecasting the Zones of Clogging

Measurements of dielectric parameters followed by permeability tests are performed on soil samples of infiltration basin. The dielectric parameters are obtained by TDR （time domain reflectrometry） measurements from which it is found that the measurement of the permittivity, the electrical conductivity and the relaxation time of compacted soil allows the mapping of the values of the coefficient of permeability at the surface of an infiltration basin. With the distribution of the coefficient of permeability, the areas of water stagnation can be detected before the basin filling. The study proves that the TDR measurements for the detection of these zones can be used for the management of infiltration basins for sustainable working and their remediation can be undertaken before the rainy seasons.