Superplastificante basado en formaldehído con acetona sulfonado (AK)

Descripción
La resina de acetona-formaldehído (AK) es una clase de sustancia activa superficial macromolecular aniónica que se deriva de acetona, formaldehído y agente sulfonante con catálisis alcalina. AK es un reductor de agua de alto rango, comúnmente referido como un superplastificante. AK no contiene cloruro añadido.

Cumplimiento de estándares
AK cumple con ASTM C494, tipo F estándar para reductor de agua de alta gama.

Propiedades típicas

Items	Specification
	AK Powder	AK (42%)
Visual Appearance	Dark Brown Color	Dark Brown Color Liquid
Moisture, %	8.0 max	—
Fineness (0.315mm remains), %	15.0 max
pH value	8 – 10
Chloride Content, %	0.1max
Na2O+0.658K2O (%)	5.0 max
Cement Paste Flow, mm	240
Solid Content ,%		42%

Applications

• Used for projects such as skyscrapers, wide bridge, ocean oil drilling platform, which requires high performance concrete with property of high strength, elasticity, fluidity, and impermeability.
• AK is especially applicable to following types of concrete: flowable and plastic concrete, autotrophic or steam curing concrete, impermeable and water proof concrete, durable and anti-freeze/thaw concrete, anti-sulphonate-corrosion concrete, steel-bar enforced concrete, and pre-stress concrete.
• Used to make high strength concrete pipe (PHC) C80, ready mixed concrete (C20-C70), pumping concrete, high performance concrete, self-compacting concrete, water-proofing and large volume concrete.
• Used in all kinds of Portland cements and steam curing concrete.

Features and Benefits

• AK is alkalescent and has a high water reducing rate of 15-25%.
• When it’s added, 25-30% of cement can be saved without sacrificing strength and slump loss compared with plain concrete.
• AK has significant early and post-strengthening ability. Concrete added with AK can reach to 60-70%, 100% of designed strength in 3 and 7 days respectively. Thus its strength is enhanced by 30-40% compared with plain concrete in 28 days.
• AK has high plasticity. Concrete added with AK has less slump loss. It almost has no slump loss in 60 minutes and only loses 10-20% in 90 minutes.
• AK is applicable to a variety of cement. It improves workability and plasticity. It works well with other admixtures.
• AK can improve anti-freeze/thaw ability and impermeability of concrete. It protects concrete from sulphonate corrosion and improves physical performance in many other aspects.
• AK is nontoxic, nonflammable and noncorrosive to steel bars.
• AK effectively reduces the reaction with alkaline aggregates and has no crystallization from sodium sulphate in winter.

Performance Data

Dosificación
La dosis óptima de AK para cumplir con los requisitos específicos debe determinarse siempre mediante ensayos utilizando los materiales y las condiciones que se experimentarán en el uso. Cuando se aplica AK en forma de polvo, la dosificación normal oscila entre 0,4% y 1,2% del peso de material cementoso, mientras que la tasa sugerida es de 0,6% teniendo en cuenta factores técnicos y económicos.