Information on the most widely used ASTM standards within the materials testing industry
ISO 679, ASTM C109
Cement, brick, ceramic tiles Flexural test fixture is an industrial product used to test the flexural strength of cement mortar, brick, ceramatic products. Composed of the lower fixture base, upper fixture base, standard clamping rollers, and the upper and lower pressing strips of the anti-splitting fixture. This product complies with multiple national standards including JC/T683-1997 and ISO 679 / GB/T17671-1999, and is compatible with various pressure testing machines for strength testing. After use, it is necessary to promptly clean the debris from the test specimens, and to apply lubricating oil to the moving parts and anti-rust oil to the smooth surfaces to ensure the longevity of the equipment. Some models, such as the 40×40×160mm fixture, are specifically designed for the ISO 679 / GB/T17671-1999 standard and need to be used in conjunction with a compression testing machine.
Unitedtest flexural fixture adopts a modular design, with the lower fixture base fixed to the press piston by positioning pins and washers, and the upper fixture base connected to the press beam by diamond pins and screws, allowing for quick installation and high compatibility. It mainly consists of a lower fixture base, an upper fixture base, standard clamping rollers, and top and bottom pressure strips of the anti-splitting fixture. The top and bottom pressure strips of the anti-splitting fixture are made of high-carbon steel to ensure no deformation during long-term use.
General introduction
Cement, brick, ceramic tiles Flexural test fixture is an industrial device used to test the flexural strength of cement mortar, brick, ceramatic products. Composed of the lower fixture base, upper fixture base, standard clamping rollers, and the upper and lower pressing strips of the anti-splitting fixture. This product complies with multiple national standards including JC/T683-1997 and GB/T17671-1999, and is compatible with various pressure testing machines for strength testing. After use, it is necessary to promptly clean the debris from the test specimens, and to apply lubricating oil to the moving parts and anti-rust oil to the smooth surfaces to ensure the longevity of the equipment. Some models, such as the 40×40×160mm fixture, are specifically designed for the GB/T17671-1999 standard and need to be used in conjunction with a compression testing machine.
Unitedtest flexural fixture adopts a modular design, with the lower fixture base fixed to the press piston by positioning pins and washers, and the upper fixture base connected to the press beam by diamond pins and screws, allowing for quick installation and high compatibility. It mainly consists of a lower fixture base, an upper fixture base, standard clamping rollers, and top and bottom pressure strips of the anti-splitting fixture. The top and bottom pressure strips of the anti-splitting fixture are made of high-carbon steel to ensure no deformation during long-term use.

Specification
Weight: 5Kg
Accuracy: 0.1mm%
Dimensions: 115*115*161mm
Product Purpose: Concrete flexural and compressive testing
Loading roller diameter: 10mm
Length of upper and lower pressing plates: 40 ±0.05mm
Width of upper and lower pressing plates: >40mm
Lower supporter span distance :100mm.
Standard
ISO 679 determining the compressive strength (and optionally flexural strength) of cement, using a standardized mortar mix rather than testing pure cement paste or concrete. It is the benchmark that allows different cements from different plants and countries to be compared on a level playing field.
ASTM C109 is the fundamental test method for determining the compressive strength of hydraulic cement using 2-inch (50-mm) mortar cubes. It specifies a standardized procedure to prepare, cure, and test 50-mm (2-in.) cube mortar specimens for compressive strength. The mortar mix ratio is 1 part cement to 2.75 parts standard sand (by mass). For Portland/air-entraining Portland/Portland-limestone cements, water content is fixed; for other cements, water is adjusted to achieve a flow of 110±5 (per 25 drops on a flow table, ASTM C230). Specimens are compacted in two layers by tamping, cured, and loaded in compression until failure to calculate strength as peak load divided by cross-sectional area.
ASTM C158 is a standard test method for determining the flexural strength (modulus of rupture, MOR) of glass and glass-ceramics via bending, covering two core methods (A for flat glass, B for rectangular/elliptical cross-sections) with clear specimen, equipment, procedure, and calculation rules. It is critical for glass engineering as flexural strength directly governs structural safety, design optimization, and compliance with industry standardsNational Glass Association.
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