منابع مشابه
Mechanical Properties of Gypsum Board at Elevated Temperatures
Gypsum board is a common fire barrier used in house and general building construction. Recently, evaluation of the collapses of the World Trade Center Towers highlighted the potential role and failure of gypsum board in containing the fires and resisting damage. The use of gypsum board as primary fire protection of light-flame wood or steel construction is ubiquitous. Yet knowledge of the commo...
متن کاملTreatment and Disposal of Gypsum Board Waste -- Industry Position Paper
Background Gypsum, or calcium sulfate dihydrate, (CaSO4 l 2H2O) is the major component of drywall, or gypsum board, core. It is a naturally occurring mineral, deposited largely as a result of the evaporation of water in ancient inland seas, which contained large amounts of dissolved gypsum. For example, the evaporation of a typical 20,000 gallon residential swimming pool filled with seawater wi...
متن کاملGypsum-based biomaterials: Evaluation of physical and mechanical properties, cellular effects and its potential as a pulp liner.
This in vitro study aimed to evaluate setting time and compressive strength of gypsum-based chitosan biomaterials and its effect on proliferation of stem cells from human exfoliated deciduous teeth (SHED) and alkaline phosphatase (ALP) activity. Pure-GYP was mixed with water (2.5 g: 1.9 mL); Gyp-CHT was prepared with gypsum, chitosan, and water (2.5 g: 0.285 g: 1.9 mL). Cell viability and ALP a...
متن کاملStudy on Preparation of High-strength Gypsum by FGD Gypsum
With the enlarging of industrial desulfurization, the amount of FGD gypsum is increasing rapidly. The preparation of alpha-calcium sulfate hemihydrate (α-HH) is one of the biggest concerns for FGD gypsum reclamation. The influence of mixed chlorate solution of Mg-Ca-Na concentrations (5-30 wt%) and FGD gypsum concentrations(5-30 wt%) by hydrothermal salt solution method at atmospheric were inve...
متن کاملeffect lignocellulosic materials on hydration process, vicat and mechanical properties of gypsum bonded particle board
gypsum-bonded particleboard panels were made from various mixture of bagasse (saccharum ossicinarum l.) and wheat (oryza sativa l.) straw particles bonded with different ratio level of particles/gypsum. this study examined possible feasibility of bagasse and wheat straw particles in the production of gypsum-bonded particleboard (gbpb). one-layer experimental gbpb with density of 1.05 and 1.20 g...
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 1974
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.28.6_252