Natrium-Naphthalin-Formaldehyd (langsam gerinnen)

This product is bond with high efficient water reducing admixture and many slow congeal medicinal preparation. It can not only maintain the early and intensive strengthening ability, but also delay the hardening rate of cements, as well as extend the condensation time. It can reduce slump loss, improve the construction performance of concrete. Uniform nature targetTest projectTargetExteriorShallow brown powderSolid content %≥90The cement only thick liquid flows≥180Degree of fineness(0.315mm sieves the remainder) %<15Cl – content %≤1 Matters of attention 1. The recommend mixture quantity: 0.6%～1% (according to weight of cement). Determine the best mixes quantity should before use by try-match method. 2. This product uses easily and conveniently, wet mix as well as dry mix can do dry mix should lengthen the stir time suitably. 3. This product is packed to a 25 kg sack, should be stored in dry, well ventilated environment. 4. If the tide agglomerates, the performance is invariable, and can be used after crushing. 5. Storage time: 2 years. Main uses It is suitable to pump transport concrete, shopping concrete, great volume concrete; especially suitable to construction of summer concrete and slippery mold concrete. Main performance 1. The quantity of mixture is 0.6%～1% of cement, water reduce rate may reach 14%～22%; 2. Not affect early time strength, 3～7 days strength to blank concrete may increase above 25%,28 days may enhance above 20%; 3. The concrete set time may extend to 2～4 hours, it may lengthen or shrink if needed; 4. The exothermic time may be postponed, low the heat peak (value) number, prevent concrete from cracking because of temperature increase; 5. Improve the workability of concrete, mixture ratio is in variable, slump may enhance, and slump loss may smaller; 6. When concrete’s workability and intensity are close, it may save about 10percent cement; 7. The durability enhances, no corrosion harm to steel. Concrete performance index Test projectTop-quality productTop-quality productRate of water reduce %≥12≥10Rate of water filter %≤100≤100Gas content %≤4.5≤4.5Difference of the set time minInitially congeals>+ 90>+ 90End congeals——Resistant to compression strength ratio%1 day——3 days≥125≥1207 days≥125≥11528 days≥120≥110Shrinkage ratio( 28 days) %≤135≤135Steel rust eclipse functionNoNo