Test Plan for ASTM C91 Masonry Cement

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Test Plan for ASTM C91 Masonry Cement

Test Plan for ASTM C91 Masonry Cement

Required Tests

PropertyMaterialASTM / MethodDetails
Compressive StrengthMortarASTM C109

Compressive Strength of Hydraulic Cement Mortars Using 2″ Cube Specimens

Cube specimens are cast and three are tested at each of 1, 3, 7, and 28 days of curing. Samples are cured for the first 24 hours in a standard moist room, and all subsequent days in saturated lime water.

Autoclave ExpansionCement PrismsASTM C151

Autoclave Expansion of Hydraulic Cement

Prisms are cast, and after 24 hours of curing, the lengths are measured. They are subsequently subjected to multiple hours of elevated temperature and pressure in an ASTM C151 compliant autoclave. Cement prisms are then cooled and measured. The length change is then compared with the initial length and compared to any relevant specification.

Air ContentMortarASTM C185

Air Content of Mortar (Modified per ASTM C91)

Mortar is cast to the desired consistency, and it is consolidated in a 400mL brass measuring container described in ASTM C185. The weight/volume is determined, and the air content is calculated based on the mix proportions.

Normal ConsistencyCement PasteASTM C187Amount of Water Required for Normal Consistency of Hydraulic Cement Paste
Time of SettingCement PasteASTM C266

Time of Setting of Hydraulic Cement Pastes by Gillmore Needle

Paste is caste to the desired consistency and placed in each section of the Gillmore apparatus. The Gillmore needles are used to determine when the initial and final set have occurred.

FinenessCement PowderASTM C430Fineness of Hydraulic Cement by the 45-μm (No. 325) Sieve
Water RetentionMortarASTM C1506Air Content of Mortar (Modified per ASTM C91)

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