共查询到20条相似文献,搜索用时 349 毫秒
1.
2.
3.
4.
5.
微晶玻璃装饰板材是新兴的建筑装饰板材,分平板和圆弧板两种。该板 板与大理石板材相比较,具有色彩均匀无色差,天然大理石般的柔和感,无水湿性,无放射性等优点,是高档建筑装饰的庞儿。但其生产设备主要从国外引进,费用很高。其生产设备国产化已很有必要。 相似文献
6.
7.
8.
9.
针对醛酮系减水剂(SAF)合成原材料价格上涨的现状与纸浆黑液资源化利用的紧迫性,设计合成了一种醛酮-木质素共聚物(SAF-LS)。采用红外光谱和粘度试验对醛酮-木质素之间的接枝共聚反应进行了论证。对比了SAF,SAF-LS以及醛酮减水剂与木质素冷复配产品(SAF+LS)在净浆、混凝土中的作用效果,证明SAF-LS是一种性能略逊于SAF,但远优于SAF+LS的减水剂。利用SAF-LS和缓凝组分,设计配制了坍落度保持性和强度发展均十分优良的强度等级为C30-C50的预拌混凝土。 相似文献
10.
麦秸生态板是零甲醛添加板材,具有环保、强度高、防潮性能好、便于加工、抗震性能好等优点,可广泛应用于室内装饰、家具、隔断墙等。板材分为基材板和面材板,常规产品规格为2 440 mm×1 220 mm,厚度有:5 mm、8 mm、11 mm、15 mm和18 mm。基材板可直接代替细木工板使用,面材板可作为外装饰面起到美化空间的效果。麦秸生态板是一种有利于人们健康的新型室内装饰材料。 相似文献
11.
结合日常检测工作,着重讨论了GB/T17657-1999中光度法测量人造板中甲醛释放量的化学分析过程;标准中应明确甲醛释放量平行试验结果之间的比对值以利于实验室内部和实验室之间的比对,以及甲醛释放量试件应进行预处理,在一定温度和湿度条件下达到恒重之后再进行试验。 相似文献
12.
我国的人造板产量已跃居世界第1位。人造板在生产过程中会散发大量的甲醛,使得车间内工人会面临较高的健康风险,但国内鲜有其风险评估方面的研究报道。本文对某人造板车间内甲醛浓度分布进行了测试,评估了不同工作岗位上工人的健康风险。结果表明:基于终生致癌概率得到的工人健康风险为2.80×10-4~6.89×10-3,是可接受健康风险水平(1×10-6)的几百到几千倍;最高的健康风险发生在车间内最靠近热压机的工作岗位。笔者建议采用隔离热压机、增大局部排风量及加强工人自我防护等方法降低车间内工人的健康风险。 相似文献
13.
A mathematical model which describes the influence of various parameters on formaldehyde concentration in the atmosphere of a room containing wood-based boards was developed. The physical meanings and measuring methods of the parameters of the model are also discussed. Based on this model, two indices for commenting the formaldehyde emission process of wood-based boards are proposed, and inequality estimation for the formaldehyde content of wood-based boards at any moment and a time estimation which shows when the room satisfies the environment quality standard are also given. 相似文献
14.
目前低密度纤维板具有较好的机械性,而导热率是保温材料性能的重要指标之一.试验中测得密度为340kg/m3(WBP340)与410kg/m3(WBP410)的导热率分别是0.070W/(m·K)和0.077W/(m·K).对比其他常用保温材料,低密度的纤维板的导热率特性优于实木,稍逊于泡沫塑料.考虑环保因素,低密度纤维板... 相似文献
15.
本文在分析薄木拼花板式门扇结构的基础上,对其生产工艺流程进行了设计,并确定了通常情况下的门扇生产工艺技术参数,可用于木质套装门生产企业的生产作业指导。 相似文献
16.
随着家具行业的兴盛,人造板材料广泛应用到了家具当中。本文着重介绍人造板材料和它的质量指标,并对人造板材料质量指标进行分析和探讨。 相似文献
17.
18.
The aim of this work is to study the structural behavior of prefabricated thin-walled wood-based loadbearing stressed skin panels for use in roofs. These stressed skin panels are composed of double thin skins, made of waterproof agglomerate and oriented strandboard, with a rigid insulating core made of extruded polystyrene without a vapor control layer or breather membrane. Current design criteria for these panels are often governed by calculating shear strength rather than bending strength. However, bending is often observed as the controlling factor in real structures and experimental studies. This work describes a design procedure based on predicting whether bending or shear will control their structural behavior. In order to get this purpose, we have studied both experimentally and theoretically the different elements that constitute this construction system to determine accurately its response in the presence of the external loads. The numerical analysis of the different variables using the finite element method (FEM) was validated by means of real tests on prototypes. The biggest difficulties in the simulation were found in the supports, due to the contacts between the different elements that compose them, and in the orthotropic material properties. Finally, the conclusions and suggested simplified procedures of calculation to be applied in similar structures are given. Comparisons with experimental data and with predictions using the quasi-analytic formulas are provided in order to support the validity of the proposed models. 相似文献
19.
对灾区过渡安置点搭设板房常用的彩钢聚苯乙烯(EPS)夹芯板和聚氨酯(PU)夹芯板结构、防火性能进行分析,同时对安置点内帐篷材质、燃烧性能进行介绍。在彩钢夹芯板房火灾实验基础上,用火灾案例和FDS模拟方法验证分析实验结论,研究确定彩钢夹芯板房和帐篷的防火间距。 相似文献