石膏刨花板的密度、木膏比和水膏比与其性能关系的初步研究

本文通过一系列的工艺试验对石膏刨花板的密度、木膏比和水膏比与其性能的关系进行了初步的研究。结果表明：1．密度的增加会导致石膏刨花板强度的显著增加；2．提高木膏比会使静曲强度等随之上升，但对弹性模量和平面抗拉强度影响不大；3．水膏比在0．30－0．40范围内对板子性能无显著影响；4．三个因子间无交互作用。     

几种树种木材制造石膏刨花板的适应性

本文论述了挪威云杉、山杨、白桦和柞木及山杨、白桦、柞木的混合刨花制造石膏刨花板的适应性。结果表明,在工艺参数相同的情况下,木材密度越大的树种制成的板材强度越低,挪威云杉板强度最大,山杨板次之,柞木板极低。挪威云杉和山杨是制造石膏刨花板的优质树种。改变木膏比、刨花体积和对刨花进行水抽提均没有使白桦和柞木制成合格的石膏刨花板。混合刨花干扰石膏刨花板的凝固时间,致使板子强度低劣,在生产中应予避免。     

石膏刨花板的密度、木膏比和水膏比与其性能关系的初步研究

石膏刨花板是以石膏作为胶粘剂的一种新型刨花板,它是随着Kossatz 1982年发明半干法生产工艺应运而生的,通过对石膏刨花板的密度、木膏比和水膏比与其性能的关系的初步研究,结果表明:杨     

半干法石膏纤维板工艺研究：Ⅰ.原料配比,密度等对板材性能的影响

本研究是建立在我国资源和工业技术基础之上,探讨利用木纤维以半干法制造石膏纤维板（ＧＦＢ）的生产工艺;提出了半干法石膏纤维板的工艺方案,并建立了密度、木膏比、水膏比与板材性能的数学模型。结果表明：密度（Ｄ）增加,板材力学性能显著提高,木膏比（Ｗ／Ｇ）、水膏比（Ｈ／Ｇ）有效强的交互影响。木膏比增大,板材反弹率和吸水厚度膨胀率（ＴＳ）增加,纤维形态,蒸煮工艺对板材静曲性能无显著影响,纤维形态对内结合强度     

石膏锯屑增强复合材料的研究

通过一系列工艺试验，对石膏锯屑板的密度、木膏比、水膏比与其性能之间的关系进行了初步研究。结果表明，密度提高会导致石膏锯屑板强度的显著增加；木膏比与静曲强度、厚度膨胀有关，水膏比在０．３０～０．４０范围内对板性无显著影响。初步试验还得出，玻璃纤维可作为石膏锯屑板的增强材料，对其强度有显著的增强效果；石膏锯屑板具有较好的饰面性。     

刨花形态,树皮含量及石膏质量与石膏刨花板性能的关系

对刨花形态、树皮含量及石膏粉质量与石膏刨花板性能之间关系的研究结果表明:保持一定的刨花长度有利于提高石膏刨花板的静曲强度;石膏刨花板的静曲强度随着木刨花中树皮含量的增加而下降,但把树皮作为填料加入石密刨花板能使板子强度得以提高,不同产地的石膏粉制成的石膏刨花板性能差异很大,按建筑石膏粉标准测定的性能指标及相组成与石膏刨花板的性能之间无显著的相关关系。     

石膏棉秆刨花板生产工艺的初步研究

本文探讨了半干法生产石膏棉秆刨花板的可能性,并研究了生产工艺参数与板材性能的关系。试验表明:虽然棉秆具有延缓和干扰石膏水化的特性,但通过添加化学速凝剂可以满足半干法生产工艺的要求。性能试验表明:压缩和回弹是决定石膏棉秆刨花板物理、力学性质的本质。生产该板宜采用“缓凝工艺”,主要工艺参数为:密度<1.2(g/cm~3);棉/膏<0.25(重量比);水/膏=0.4(重量比)。     

石膏刨花板研究综述

石膏板具有优异的抗火性能,在轻型木结构中主要用作楼板和墙板的抗火覆面板。通过在石膏基体中复合木材刨花等植物纤维制备石膏刨花板,可不改变板材原有的生产制备工艺而提高其力学性能。生产石膏刨花板的石膏原料主要来源于工业石膏,刨花主要为农业或工业副产品,兼顾变废为宝和材料成本可控等优势,因此具有广泛的应用前景。文中综述了石膏刨花板中不同缓凝剂的作用机理、不同植物纤维类型的增强效果、后处理方式和外加剂对板材性能改善的机理等板材制备工艺,以及石膏刨花板的物理力学性能和抗火性能等研究现状,指出目前土木工程用石膏刨花板存在的不足及需进一步研究的方向,可为石膏刨花板的进一步系统研究以及工程应用提供参考。     

石膏刨花板生产工艺与发展前景

介绍了石膏刨花板（GPB）的性能、发展概况,论述了石膏粉及石膏刨花板生产工艺和特点,分析了石膏刨花板工业的发展前景。     

麦秸/石膏复合材的工艺研究

以麦秸和石膏为原料,采用铺装生产工艺,通过单因子试验,研究原料形态、料膏比、乳白胶加入量和原料预处理方式等工艺因子对麦秸/石膏复合材性能的影响,并利用体视显微镜和扫描电子显微镜观察复合材的胶接状况。结果表明:料膏比10%、原料筛网目数10～20目、乳白胶的加入量12.5%、麦秸经热水处理3h,所制备的麦秸/石膏复合材各项物理力学性能较佳,指标可达到LY/T1598—2002石膏刨花板标准合格品的要求。     

Improvement on the properties of gypsum particleboard by adding cement

Gypsum particleboard (GPB) has high thickness swelling (TS), high water absorption (WA), and low mechanical properties compared with cement-bonded particleboard. The properties of GPB were improved by adding cement. The experimental results showed that GPB with the added cement had good physical and mechanical properties compared with those of gypsum particleboard with no added cement. The TS and WA of gypsum particleboard with added cement were reduced by 10%. The mechanical properties of GPB, such as internal bond strength (IB), modulus of rupture (MOR), and modulus of elasticity (MOE), increased when the GPB was made with added cement. The properties of GPB improved relative to the quantity of cement added. With an increase of cement content from 5% to 10%, the TS and WA were reduced, and the IB, MOR, and MOE were increased. In contrast, the TS and WA increased and the IB, MOE, and MOR decreased when the cement content was increased from 15% to 30%. Thus the physical and mechanical properties of GPB were successfully improved when the added cement content was 10%.An outline of this paper was presented at the 47th Annual Meeting of the Japan Wood Research Society in Kochi, April 1997     

Effect of buffers on gypsum particleboard properties

The paper recounts how buffers affect the physical and mechanical properties of gypsum particleboard (GPB) and the initial curing time (IC) of gypsum. The acidic buffers were better than alkaline buffers for prolonging the IC of gypsum and affecting the properties of GPB. Weak acids were advantageous for curing gypsum. When suitable amounts of citric acid and trisodium citrate were added, high performances could be achieved and the IC of gypsum could be prolonged to about 2h. When alkaline buffers such as sodium carbonate were added, the 1C of gypsum was still short but the internal bond strength (IB), modulus of elasticity (MOE), and modulus of rupture (MOR) of GPB were obviously decreased. Citric acid was the best among the four buffers used; and the GPB had a good IB, MOE, MOR, and adequate IC when citric acid of 0.1% was added. Sodium carbonate was not suitable owing to low performance and short IC. Gypsum curing is an endothermic reaction.Part of this paper was presented at the 11th Annual Meeting of the Chugoko Skikoku Branch of the Japan Wood Research Society, Matsue, September 1999     

有机硅防水剂对石膏刨花板性能的影响

主要讨论了添加有机硅防水剂对石膏刨花板物理力学性能的影响。研究表明,添加适量的有机硅防水剂能提高石膏刨花板的防水性能,并对板的内结合强度、静曲强度和弹性模量有一定的改进。     

Properties of gypsum particleboard reinforced with polypropylene fibers

This paper details the influence of the length and content of polypropylene (PP) fibers on the physical and mechanical properties of gypsum particleboard (GPB). The length and amount of PP fibers added had a significant effect on the internal bond strength (IB) and the modulus of rupture (MOR) of GPB. The highest IB value was shown at 9 mm length and 9% content of PP fibers. The MOR was highest when the board was made with PP of 12 mm fiber length and 12% content. Suitable contents of PP fibers were advantageous in that they reinforced the properties of GPB so it achieved high performance. In contrast, a high content of PP fibers reduced the IB, MOR, and modulus of elasticity (MOE) of GPB. The thickness swelling was reduced with an increase in PP length and content. It was concluded that the combination of 12 mm length and 12% content or 3mm length and 9% content was optimum for producing good performance of GPB.Part of this paper was presented at the 50th Annual Meeting of the Japan Wood Research Society, Kyoto, April 2000     

水泥刨花板与石膏刨花板项目的经济分析

本文以年产1.5万m^3的水泥刨花板和石膏刨花板新建项目为例，从投资结果、经济指标分析等方面入手，分析和对比了两种无机胶凝刨花板生产的经济效益及其产生原因，为无机胶凝创花板工业化生产项目的评估提供依据。     

有关水泥(石膏)刨花板规格及性能的若干问题探讨

从建筑业应用要求出发,对现有水泥（石膏）刨花板的规格和性能要求进行了讨论,并提出了相应的建议和数值。对水泥（石膏）刨花板生产的部分关键设备提出了设计参数和选用原则。     

石膏与纤维的混合性能评价

研究了多种混合方式对混合料均匀性的影响以及对石膏纤维板半干法生产的适应性。结果表明:3种搅拌方式适合半干法工艺生产,其中悬浮气流式搅拌负面影响较小;混合料颗粒径越大,静曲强度越低;混合料均匀性与水膏比(H/G)、木膏比(W/G)相关,可用一定义的k 值定量描述。     

石膏刨花板的生产工艺及其应用前景

石膏刨花板是以建筑石膏为胶凝剂, 以刨花为加强材料的新型建筑板材.本文叙述了石膏刨花板的特点和生产工艺; 介绍了芬兰、挪威等国石膏刨花板的生产现状, 论述了我国发展石膏刨花板的可能性和必要性, 并提出了几点建议.