Most notably, outdoor exposure measurements confirmed that using a temperature correction, field results correlated very well to laboratory predictions making the test reliable for quality control purposes. Surface RH was found as an accurate and practical indicator of concrete moisture content. It was observed that water absorption increases significantly with decreasing moisture content and increasing environmental temperature. Concrete water absorption tests were performed using a commercial test device over a range of RH and temperature levels.
This study addresses the issue by investigating water absorption in different thermal and moisture conditions. Because water absorption is strongly affected by temperature as well as relative humidity (RH), on-site water absorption measurements require cautious interpretation. It is also potentially possible to perform simple and rapid nondestructive water absorption tests on placed concrete however, it is impossible to provide standard conditions for in situ measurements. Standardized laboratory methods exist to measure water absorption. Maximum permissible water absorption is shown in Table 3. Taking into account that moisture is required for many concrete deterioration processes, water absorption is a measure that can essentially evaluate concrete quality and its resistance. The most widely-used standards for specifying concrete masonry units in the United States are. This document is available in either Paper or PDF format.Concrete porosity and its interconnection are crucial aspects that influence durability. Keywordsįield treatment evaluation water absorption water repellant ICS Number Code 87.040 (Paints and varnishes) To find similar documents by ASTM Volume:Ġ6.02 (Paint - Products and Applications Protective Coatings Pipeline Coatings) To find similar documents by classification:Ĩ7.040 (Paints and varnishes Including coating powders, paint coatings and protective paint systems) This document comes with our free Notification Service, good for the life of the document. Those holes can lose the water, or can take it up again a hundred or more years later. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This standard does not purport to address all of the safety concerns, if any, associated with its use. The values given in parentheses are for information only. 1.1 This test method provides a procedure for the determination of the water absorption by a core of concrete taken from a surface treated with a water repellent.ġ.2 The intended use of the water repellent coating is to reduce the amount of water that absorbs into the substrate.ġ.3 The values stated in SI units are to be regarded as the standard.
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