Concrete Super Plasticiser: 1 Litre Water reducing Flowaid SCC superplasticizer

Product Information

Typically most standard water reducing admixtures can reduce the required water volumes by up to around 10% but in recent years developments within the admixture field have seen newer mid-range water reducers emerge. Although generally they only reduce water volumes up to around 8% they are generally more stable when exposed to a range of different temperatures. Retarding Admixtures Retarding admixtures, which slow the setting rate of concrete, are used to counteract the accelerating effect of hot weather on concrete setting. High temperatures often cause an increased rate of hardening which makes placing and finishing difficult. Retarders keep concrete workable during placement and delay the initial set of concrete. Most retarders also function as water reducers and may entrain some air in concrete.

Cost-Effective. Plasticizers in concrete are relatively inexpensive compared to other concrete additives, such as superplasticizers or air-entraining agents. They can also reduce the overall cost of construction by allowing for faster and easier placement of concrete, reducing labor costs and construction time. Over the last 60 years more than 30,000 different substances have been evaluated for their suitability as polymer plasticizers. Of these, only a small number – approximately 50 – are today in commercial use. [6] In past years, PVA glue was often mixed into the water added to a concrete mix but in more recent times SBR (a kind of grown up version of PVA) was the preferred substance to use. Over a number of years, the steel within the concrete can start to corrode and rust and this can severely affect the strength of the concrete itself and in some severe situations cause it to fail.Concrete doesn’t always come in grey, it can come in a range of different colours, sometimes these are dictated by the types of materials used e.g. the colour and shade of sand, aggregate etc but it can also be coloured using special dyes. Polycarboxylate ether superplasticizer (PCE) or just polycarboxylate (PC), work differently from sulfonate-based superplasticizers, giving cement dispersion by steric stabilisation. This form of dispersion is more powerful in its effect and gives improved workability retention to the cementitious mix. [16] Stucco [ edit ] The naphthalene based superplasticizer is often used to formulate high fluidity, high strength and high performance concrete. It is especially suitable for use in the following concrete projects: fluidized concrete, plasticized concrete, steam-cured concrete, impermeable concrete, waterproof concrete, natural curing prefabricated concrete, reinforced and prestressed reinforced concrete, high-strength ultra-high-strength concrete. Additionally shrinkage can occur over a longer period, in this case many years. The introduction of a shrinkage inhibitor can also help to reduce long-term shrinkage affects. Superplasticizers are also called high range water reducers, it can improve the strength and durability of concrete. Besides, they increase slump for easier placement, resulting in denser and more durable concrete.

ALPHALITH® concrete superplasticizers and plasticizers allow for the production of cost-optimized top-quality concrete in all consistency, strength and exposure classes. Naphthalene sulfonate plasticizers are made from naphthalene, a type of aromatic hydrocarbon. They are commonly used in precast and ready-mix concrete to improve workability and reduce water content. The use of superplasticizers may produce high strength concrete (compressive strength up to 22,000 psi). Superplasticizers can also be utilized in producing flowing concrete used in a heavy reinforced structure with inaccessible areas. Do I need plasticiser in concrete? Terephthalates are isomeric with ortho phthalates but have proven to have cleaner toxicological results due to their inability to form stable monoesters during hydrolysis and metabolic breakdown. Substantial concerns have been expressed over the safety of some polymer plasticizers, especially because some low molecular weight ortho-phthalates have been classified as potential endocrine disruptors with some developmental toxicity reported. [8] Plasticizers can escape plastics due to migration and abrasion of the plastic since they are not bound to the polymer matrix. The " new car smell" is often attributed to plasticizers or their degradation products, [9] however, multiple studies on the makeup of the smell do not find phthalates in appreciable amounts, likely due to their extremely low volatility and vapor pressure. [10] Common polymer plasticizers [ edit ] Ortho phthalates [ edit ]A delay occurs in the initial hydration of aluminates and silicates when the plasticizers are added. The plasticizer gets adsorbed on the surface of the hydrated product of alumina. The adsorption of plasticizer on other hydrated phases of silicates is continued depending upon the C 3A content in cement and plasticizer quality. Sebacate- based plasticizers provide excellent compatibility with a range of plastic materials and synthetic rubbers (specifically nitrile rubber and neoprene), superior properties at low temperatures, and good oil resistivity. Some examples are: PCE has good compatibility with cement, additives, and other admixtures. The concrete does not segregate or secrete water. Besides, it has a good slump retention performance. Works well with from scratch mix design, also turns premix blends into high performance flowable concrete.

systems or prestressing steel. Do not use with admixtures containing betanaphthalene sulfonate ( meaning, don't mix it with other types of water reducing/plasticizer admixes, duh!). Ditridecyl phthalate (DTDP) is the highest molecular weight phthalate plasticizer, providing greater performance at high temperature. It is the preferred plasticizer for automotive cable and wire application. Sulfonated melamine formaldehyde condensates are often preferred superplasticizers in the precast industry because they do not dim the cement setting. 2.Sulphonated Naphthalene Formaldehyde Condensates (SNF):

What is the role of plasticizer?

Whereas accelerators speed up the curing of a concrete mix, as you may have guessed, retarding admixtures slow down the curing process. Gas forming admixtures are also used to prepare light weight concrete. For settlement and bleeding resistance purpose, small quantity of gas forming admixtures which is generally 0.5 to 2% by weight of cement is used. But for making light weight concrete larger quantity generally 100 grams per bag of cement is recommended.