Whiskers as perspective input material for production of high temperature resistant ceramic building materials

Concrete building safety of fire is better than other building materials such as wood, plastic, and steel,because it is incombustible and emitting no toxic fumes during high temperature exposure. However,the deterioration of concrete because of high temperature exposure will reduce the concrete strength.Mechanical properties such as compressive strength and modulus of elasticity are absolutely corruptedduring and after the heating process. This paper aims to investigate mechanical properties of concrete(especially compressive strength and modulus of elasticity) with various water-cement ratio afterconcrete suffered by high temperature exposure of 500oC.This research conducted experimental method and analytical method. The experimental methodproduced concrete specimens with specifications: (1) specimen’s dimension is 150 mm x 300 mmconcrete cylinder; (2) compressive strength design, f’c = 22.5 MPa; (3) water-cement ratio variation =0.4, 0.5, and 0.6. All specimens are cured in water for 28 days. Some specimens were heated for 1hour with high temperature of 500oC in huge furnace, and the others that become specimen-controlwere unheated. All specimens, heated and unheated, were evaluated by compressive test.Experimental data was analyzed to get compressive strength and modulus of elasticity values. Theanalytical method aims to calculate modulus of elasticity of concrete from some codes and to verifythe experimental results. The modulus elasticity of concrete is calculated by 3 expressions: (1) SNI03-2847-1992 (which is the same as ACI 318-99 section 8.5.1), (2) ACI 318-95 section 8.5.1, and (3)CEB-FIP Model Code 1990 Section 2.1.4.2.The experimental and analytical results found that: (1) The unheated specimens with water-cementratio of 0.4 have the greatest value of compressive strength, while the unheated specimens with watercementratio of 0.5 gets the greatest value of modulus of elasticity. The greatest value of compressivestrength of heated specimens provided by specimens with water-cement ratio of 0.5, while the heatedspecimens with water-cement ratio of 0.4 gets the greatest value of modulus of elasticity, (2) Allheated specimens lose their strength at high temperature of 500oC, (3) The analytical result shows thatmodulus of elasticity calculated by expression III has greater values compares to expression I and II,but there is only little difference value among those expressions, and (4)The variation of water-cementratio of 0.5 becomes the optimum value.

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The Potential of Ceramic Building Materials in Understanding Late Antique Archaeology

Field Methods and Post-Excavation Techniques in Late Antique Archaeology ◽

10.1163/22134522-12340020 ◽

2015 ◽

pp. 573-594

Keyword(s):

Building Materials ◽

Late Antique ◽

Ceramic Building

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Environmental Friendly Ceramic Building Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.690.150 ◽

2016 ◽

Vol 690 ◽

pp. 150-155 ◽

Cited By ~ 2

Author(s):

Toyohiko Sugiyama ◽

Keiji Kusumoto ◽

Masayoshi Ohashi ◽

Akinori Kamiya

Keyword(s):

High Performance ◽

Building Materials ◽

Bending Strength ◽

Low Cost ◽

Porous Ceramic ◽

Ceramic Materials ◽

Porous Ceramics ◽

Heat Island ◽

Solar Reflectance ◽

Ceramic Building

The global warming is one of the most serious problems. The decrease of CO2 emissions in our daily life is an important subject today. Recently, an application of water retentive materials as a paving material has attracted a great deal of attention in Japan. This material is effective for reducing heat island phenomenon, which is also a recent problem in many cities in Japan. Water retained in the material during rainfall evaporates when heated by sunshine. The latent heat absorbed by evaporating water works to cool the surroundings. The water retentive ceramic products are expected to be useful for building materials as well as pavements. Several performances are required on the water retentive ceramics when it is used as building materials. Its cost and quality are the important factors. Porous ceramic materials formed by pressing without firing is one of ideal low cost and eco-friendly candidates. The porous ceramics is also expected to be produced from recycled ceramic materials. By optimizing its composition and forming method, a water retentive material with high performance was developed. The trial product had the properties as follows; fracture toughness: 1300N, bending strength: 175N/cm, water absorption: larger than 30%, and precision in size (length): +-0.5mm for 150mm. The product showed also enough frost resistance. In this paper, the fundamental properties of the porous ceramics prepared without firing are discussed with referring to the results of the field experiments.Another subject recently studied by several tile manufactures in Japan is the glazed tile with high solar reflectance. The exterior walls covered with such a high solar reflectance tile keeps the surface temperature of the wall lower under the strong sunshine of summer. It is effective against heat-island phenomenon. In this paper, the outline of the research results on visible and infrared reflectance of many kinds of glazes is also discussed.

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Treatments of Magnesium Slag to Recycle Waste from Pidgeon Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.1657 ◽

2011 ◽

Vol 418-420 ◽

pp. 1657-1667 ◽

Cited By ~ 4

Author(s):

Feng Lan Han ◽

Qi Xing Yang ◽

Lan Er Wu ◽

Sheng Wei Guo

Keyword(s):

Global Warming ◽

High Temperature ◽

Natural Resources ◽

Building Materials ◽

Volume Stability ◽

Global Warming Impact ◽

Slag Powder ◽

Magnesium Production ◽

Higher Temperature ◽

Pidgeon Process

Magnesium slag powder from a local magnesium plant was treated to improve the volume stability for its application as building materials. The slag was mixed with borates, pressed into briquettes, and then sintered at high temperature. SEM studies show that at the higher temperature Ca2SiO4polymorphs were stabilized by Na and B ions in the added borates. The free MgO content in the slag was also decreased by the sintering treatment. The slag powder, after mixing with 0.4-0.6% of borates and sintered at 1200°C in 5-6 hours, has become volume stable aggregates. It is then possible to use the treated slag in constructions, saving valuable natural resources and decreasing the global warming impact from magnesium production via Pidgeon process.

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The Use in the Production of Clinker Waste of Non-Ferrous Metallurgy and Power Engineering of East Kazakhstan

Ecology and Industry of Russia ◽

10.18412/1816-0395-2020-3-14-18 ◽

2020 ◽

Vol 24 (3) ◽

pp. 14-18 ◽

Cited By ~ 2

Author(s):

V.Z. Abdrakhimov ◽

A.K. Kairakbaev ◽

E.S. Abdrakhimova

Keyword(s):

Environmental Protection ◽

Ferrous Metallurgy ◽

Industrial Waste ◽

Building Materials ◽

Light Fraction ◽

Power Engineering ◽

Raw Material ◽

Material Base ◽

East Kazakhstan ◽

Ceramic Building

The technology of obtaining clinker bricks on the basis of waste of non-ferrous metallurgy – clay part of the "tails" of the gravity of zircon-ilmenite ores and waste of energy – ash of light fraction is considered. The use of non-ferrous metallurgy and energy waste in ceramics contributes to the disposal of industrial waste, environmental protection and the expansion of the raw material base for ceramic building materials.

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