7007 SEAWAY BLVD 2019-02-06 - Laserfiche WebLink

t1. �� wRDa 19 • SUPERPLASTICIZER / r �� ahc. GRACE • COnCReTe a ixTuRVs 1 • 1 - ASTMC494TYPE A&F. • DESCRIPTION: WRDA®-19 is a high range water-reducer, commonly re- 5.WRDA-19 concrete,even at high slump,exhibits no signif- ferred to as a superplasticizer. It is an aqueous solution of a icant segregation in comparison to concrete without a modified naphthalene sulfonate. It is a low viscosity liquid superplasticizer at the same slump. which has been formulated by the manufacturer for use as 6.WRDA-19 aids in rapid discharge of concrete from truck received. WRDA-19 contains no added chloride. WRDA-19 mixers thereby reducing on the job time and improving is formulated to comply with specifications for Chemical mixer utilizations Admixtures for Concrete, ASTM Designation: C-494 as a Type A,or as a Type F admixture. ADDITION RATES: One gallon of WRDA-19 weighs approximately 10 lbs. Addition rates of WRDA-19 can vary with type of application, but will normally range from 6 fluid ounces to 20 fluid ounces DISPERSION: per 100 lbs.of cement. In most instances the addition of 10 WRDA-19 is a superior dispersing admixture having a to 16 fluid ounces per 100 lbs.of cement will be sufficient.At marked capacity to disperse the cement agglomerates nor- a given water/cement ratio, the slump required for place- mally found in a cement-water suspension.The capability of ment can be controlled by varying the addition rate.Should WRDA-19, in this respect, exceeds that of normal water job site conditions require using more than recommended reducing admixtures. addition rates,please consult your Grace Representative. USES: COMPATIBILITY: WRDA-19 produces concrete with extremely workable char- In concrete containing WRDA-19, the use of a Vinsol resin acteristics referred to as high slump, flowing concrete. air entraining agent(such as DARAVAIR®)is recommended WRDA-19 also allows concrete to be produced with very low to provide suitable air void parameters for resistance against water/cement ratios at low or normal slumps. freeze-thaw attack. — WRDA-19 is ideal for use in prestress, precast, bridge deck Most Type A water reducers or Type D water reducing re- or any concrete where it is desired to keep the water/cement tarders are compatible with WRDA-19 as long as they are ratio to a minimum and still achieve the degree of workabil- separately added to the concrete.Pretesting of the concrete ity necessary to provide easy placement and consolidation. should be performed to optimize dosages and addition WRDA-19 will also fluidize concrete making it ideal for times of these admixtures. Caution should be exercised tremie concreting or other applications where high slumps when using WRDA-19 together with a retarder,as excessive are desired. retardation can occur if the admixture dosages are too high. ADVANTAGES: Pretesting of the concrete should be performed to determine dosages and addition times of these admixtures. The 1. WRDA-19 can produce high slump flowable concrete at admixtures should not contact each other before they enter no loss in strength. the concrete. 2. WRDA-19 can produce low water/cement ratio concrete and therefore,high strengths. PACKAGING: 3.WRDA-19,in prestress/precast work,can be used to sub- WRDA-19 is available in bulk, delivered by metered tank stantially reduce or eliminate the high energy require- trucks,and in 55 gallon drums.WRDA-19 contains no flam- ments of external heat for accelerated curing. mable ingredients. 4.WRDA-19 concrete produced with Type I cement may be It will begin to freeze at approximately 32°F,but will return to substituted for normal concrete produced with Type III full strength after thawing and thorough agitation. cement to achieve early release strengths. In storage, and for proper dispensing, WRDA-19 should be maintained at temperatures above 32°F. We hope the information given here win be helpful.It is based on data and knowledge considered to be true and accurate and is offered for the user's consideration,investigation and verification but we do not warrant the results GR AcE to be obtained.Please rend at statements,recommendations'or suggestions in conjunction with our conditions of sale which apply to all goods supplied by us.No statement,recommendation or suggestion is intended for any use which would infringe any potent or copyright.Construction Products Division,W.R.Grace&Co..62 Whittemore Ave.,Cambridge,Mass.02140 Construction Products Form CMO-382E Printed in U.S.A. 6/87 FA/GPS/5M