1、Designation: D6532 00 (Reapproved 2014)Standard Test Method forEvaluation of the Effect of Clear Water Repellent Treatmentson Water Absorption of Hydraulic Cement MortarSpecimens1This standard is issued under the fixed designation D6532; the number immediately following the designation indicates the
2、 year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method evaluates the effectiveness of cle
3、arwater repellents on hydraulic cement mortar specimens basedon water absorption after a water soak.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if
4、 any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C109/C109M Test Method for Compressive Strength
5、 ofHydraulic Cement Mortars (Using 2-in. or 50-mm CubeSpecimens)D1475 Test Method For Density of Liquid Coatings, Inks,and Related ProductsD3924 Specification for Environment for Conditioning andTesting Paint, Varnish, Lacquer, and Related MaterialsE145 Specification for Gravity-Convection and Force
6、d-Ventilation Ovens3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 clear water repellent, na coating formulated for thepurpose of protecting porous substrates by reducing the pen-etration of liquid water.4. Summary of Test Method4.1 The masonry unit is immersed in a clear wate
7、r repellent,removed and allowed to cure at ambient condition for 7 days.Any deviations should be noted in 10.1.2. After cure, themasonry unit is weighed and placed in water to a depth of 6.3mm (14 in.) for 3 days. After the immersion period, themasonry unit is removed and reweighed. The water repell
8、encyvalue of the treatment is then calculated using a comparison tountreated control specimens.5. Significance and Use5.1 Siliceous alkaline substrates are subject to water damagethat may result in deterioration. Water repellents can provideprotection of siliceous alkaline substrates exposed to wate
9、r.This test method is used to evaluate the efficacy of clear waterrepellents on alkaline substrates.6. Apparatus6.1 Forced Draft Oven, Type 1B, in accordance with theType Section of Specification E145.6.2 Balance, having a capacity of not less than 400 g, andsensitivity of 0.01 g.6.3 Reservoir Water
10、 Pan, capable of maintaining the waterlevel at 6.3 mm (14 in.) in depth with noncorroding rods for thespecimens to sit off the bottom.6.4 Stiff Bristle Brush, to brush the masonry units.6.5 Pressurized Air Source, to blow residual material off thebrushed masonry units.6.6 Stopwatch.7. Reagents and M
11、aterials7.1 Masonry Units, 51 by 51 by 51 mm (2 by 2 by 2 in.)masonry units prepared in accordance with procedures outlinedin Test Method C109/C109M with the form release oil re-moved can be used.8. Procedure8.1 Select substrates needed, brush, and blow off dust withpressurized air. The specimens mu
12、st be free of loose material1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.47 on Concrete, Stone and Masonry Treatments.Current edition approved Dec. 1, 2014. Published De
13、cember 2014. Originallyapproved in 2000. Last previous edition approved in 2006 as D6532 00 (2006).DOI: 10.1520/D6532-00R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, r
14、efer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1that may be lost and alter the weight. They also must be free ofmaterial that will alter the absorption characteristics.8.2
15、 Label each piece. Run triplicate samples for each waterrepellent treatment. Also include three untreated controlsamples for each series. All specimens in one series of testingshould come from the same lot of masonry units.NOTE 1To make comparison between test series, a positive controlneeds to be i
16、ncluded. For example, when using mortar cubes, 40 %isobutyltrimethoxysilane in solvent can be used as a positive control ineach series.8.3 For the specimen to be treated, measure the surface areaof each test specimen to the nearest 5 mm2(0.1-in.2) and weighto the nearest 0.1 g. Record the weight and
17、 area of the uncoatedtest specimens.8.4 Dry the required number of specimens in a forced draftoven, as specified in Specification E145, at a temperature of 806 5C until a constant weight has been reached. A constantoven weight shall be assumed when the specimen weighed tothe nearest 0.1 g loses not
18、more than 0.1 % in any 4-h period.8.5 Allow specimens to cool at standard room temperatureand humidity as specified in Specification D3924, weighspecimens, and allow to reach a constant weight under standardconditions. A constant weight at standard conditions shall beassumed when the specimen weighe
19、d to the nearest 0.1 g losesnot more than 0.2 % in any 24-h period.8.6 Calculate the amount of material to apply to obtain thespecified coverage based on manufacturers instructions afterdetermining the density as g/mL = Kg/L (weight/gal) inaccordance with Test Method D1475. Then use the followingequ
20、ation:G 5454 3 D 3 A144 3coverage rate in m2/L ft2/gal!(1)where:D = density of the water repellent test material, kg/L(lb/gal),A = area of the test specimen, mm2(in2), andG = weight of water repellent test material needed to obtainthe desired coverage rate, g.8.7 Totally immerse the specimen in the
21、water repellenttreatment to be tested until appropriate coverage rate isreached. Actual coverage rate and variation from manufactur-ers suggested coverage rate should be reported in 10.1.2.Remove from treatment and allow to drain for 1 min. Select abottom and top face of the cube. Place cube top fac
22、e down onthe rack to cure. Allow cubes to cure at standard roomtemperature and humidity, as specified in Specification D3924,for 7 days to ensure a constant weight is reached. If laboratoryconditions are different than those specified, ensure laboratoryconditions are constant and record laboratory c
23、onditions everyday throughout test period and report in 10.1.2.8.8 After 6 days, weigh cubes to nearest 0.1 g. Allow onemore day to cure and weigh again. Compare weights at Day 6and Day 7 to ensure that a constant weight is reached. If aconstant weight is not reached, repeat every day until aconstan
24、t weight is reached. A constant weight at standardconditions shall be assumed when the specimen weighed to thenearest 0.1 g loses not more than 0.2 % in any 24-h period.8.9 Record weight of dry treated specimens as Wtdand dryuntreated specimens as Wd. Place specimens in the waterreservoir, top face
25、up, on noncorroding rods or any method thatallows the specimens to sit off the bottom of the pan and be incontact with the water on all sides. The water level in thereservoir or pan should be keep constant at 6.3 mm (14 in.) withtap water at room temperature, as specified in SpecificationD3924, for
26、3 days. The 6.3 mm (14 in.) is measured from thebottom of the specimens. Do not cover or put a lid on the pan,but ensure that the water level is kept at 6.3 mm (14 in.).8.10 Remove the specimens from the water after 3 days,blot with damp cloth to remove excess water, and weighimmediately. Record wei
27、ghts of saturated treated specimens asWtsand saturated untreated specimens as Ws. Calculate waterexclusion and water absorption.9. Calculation9.1 Calculate the mean weight gain for the untreated con-trols and record as Wc.Wc5 Wg11Wg21Wg3!/3 (2)where:Ws= weight of untreated masonry unit after waterim
28、mersion,Wd= weight of untreated masonry unit before waterimmersion, andWg= Ws Wd.9.2 Calculate water exclusion (WE) value in percent, foreach specimen as follows:WE,%5 Wc2 Wts2 Wtd! 3100/Wc! (3)where:Wc= average weight gain for the untreated controls,Wts= weight of treated masonry unit after water i
29、mmersion,andWtd= weight of treated masonry unit before waterimmersion.9.3 Calculate the mean percent WE value for each three-specimen set.9.4 Calculate the water absorption (WA, %) value in percent,for each three-specimen set as follows:WA,%5 Wts2 Wtd! 3100/Wtd!; (4)orWs2 Wd! 3100/Wd) (5)9.5 Calcula
30、te the mean percent WA value for each three-specimen set.10. Report10.1 Report the following information:10.1.1 Report the mean water exclusion and water absorp-tion of each coating, and10.1.2 Report any significant deviations from the testmethod as described herein.11. Precision and Bias11.1 The pr
31、ecision and bias of this procedure have not yetbeen determined.D6532 00 (2014)212. Keywords12.1 hydraulic cement mortar specimens; water absorption;water repellent effectiveness; water repellent treatmentsASTM International takes no position respecting the validity of any patent rights asserted in c
32、onnection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the resp
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34、l consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International,
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