Additivity effects in the rheology of fresh concrete containing water-reducing admixtures Article in Construction and Building Materials 25(6):2955–2960 · June 2011 with 50 Reads
2. High Slump Retention. PCE-High Slump Retention is a new generation superplasticizer for concrete. It contains polycarboxylate ether polymers and is specially formulated for ready-mix concrete where slump retention, high strength and durability are required in hot climates.
Advantages of Superplasticizer For Sale. High range concrete superplasticizers from Kingsun Company have a strong dispersing effect on cement, which can greatly improve the fluidity of the cement mixture and the slump of the concrete, and at the same time greatly reduce the water consumption and significantly improve the workability of the concrete.
CBD-203. Superplasticizers in Concrete. Originally published February 1979. V.S. Ramachandran. A superplasticizer is one of a class of admixtures called water-reducers that are used to lower the mix water requirement of concrete.
an investigation into the relation between the strength and density of normal concrete a thesis by enrique i. espino university of illinois urbana, illinois ...
over the rheology of the concrete and that is one of the reasons as to why such admixtures are always used for producing self-compacting, smart dynamic concrete, etc. High-range water-reducing superplasticizers use a new customized PCE polymer technology providing advanced rheological properties to the concrete.
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The effect of slump (or superplasticizer dosage) on the surface permeability of the HPC decreased as compressive strength increased. The use of a retarding agent in HPC without silica fume increased the air permeability of the surface concrete. This effect is particularly important for the concrete containing a high dosage of superplasticizer.
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2014/4/24 · From Table 1, all the star-shaped polycarboxylate superplasticizer solutions synthesized in this invention exhibit the excellent dispersing ability and adaptability to cement at the W/C of 0.29 and dosage of 0.20%. 2. Fluidities of Cement Pastes at Lower Dosage The ...
The effect of superplasticizer (Polycarboxylic Ether) on the compressive strength of concrete using different water cement ratio was studied. The superplasticizer was used as an admixture. The superplasticizer was added to the concrete at 0%, 2%, 2.5% and 3.5% by weight of cement and varying water cement ratio of 0.4, 0.45, 0.50 and 0.55.
This paper examines the influence of dosing method and material characteristic of superabsorbent polymers (SAP) used for internal curing, on the selected concrete properties. A new method of introducing SAP into the concrete mix and its impact on the shrinkage and compressive strength of concrete was studied. It was shown that the method of dosing SAP to the concrete mix and the …
A composition, comprising: (a) an oxidizing agent comprising cerium having a cerium oxidation state of +4 to oxidize arsenic having a +3 oxidation state to arsenic having a +5 oxidation state; and (b) a rare earth-containing precipitating agent comprising a rare earth having a rare earth oxidation state of +3 to precipitate, from an aqueous solution, the arsenic in the +5 oxidation state.
Use of Superplasticizers and Its Effect. Concrete Early Strength. The reduction of w/cm by 20 to 25 % enhances concrete early strength by 50 to 75 % as shown in figure below: Figure 1 Influence of the addition of superplasticizers on the early strength of concrete with cement content of 370 kg/m 3 and cast in room temperature (Neville, 1995).
Air entrainment affects compressive strength of concrete and its workability. It increases the workability of concrete without much increase in water-cement ratio. Compressive strength of concrete is inversely proportional to workability of concrete. When workability of concrete increases, its compressive strength decreases.
the use of high-slump concre t e . Superplasticized concrete also works well for pumping opera-tions. The fluid concrete consis-tency reduces pump pre s s u re s and eliminates the need for alter-ing mix designs for pumping great heights. It can also eliminate the need to use staging pumps.
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This experimental was investigating the effects of adding silica fume, fly ash, and superplasticizer for the compressive strength and flexural strength of the OPS lightweight concrete. It was found that OPS lightweight concrete has compressive strength up to 23.90 MPa in 28-days and flexural strength up to 2.54 MPa in 28-days.
Preparation of Concrete Superplasticizer by Oxidation-Sulfomethylation of Sodium Lignosulfonate. Guang Yu, Bin Li, Haisong Wang,* Chao Liu, and Xindong Mu* Modification of sodium lignosulfonate (SLS) via combined oxidation-sulfomethylation was employed to prepare concrete superplasticizer.
concrete with very little effect on the compressive strength of hardened concrete [3]. In this study the mixtures of geopolymer binder were made of fly-ash and alkali activator, with certain molarity of sodium hydroxide. To facilitate the pouring then used superplasticizer. Tests performed were setting time, compressive strength and
portant admixtures are superplasticizers, i.e. the modifiers which allow for high-range reducing of the water content in the concrete mix. The most effective superplasticizers are based on polycarboxylates and their de-rivatives. The state of the art in the range of polycarboxylate admixtures for concrete is presented in the paper.
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Superplasticizers (SP's), also known as high range water reducers, are additives used in making high strength concrete. Plasticers are chemical compounds that enable the production of concrete with ca. 15% less water content. Superplasticers allow reduction in water content by 30% or more.
Superplasticizers are used for the production of flowing concrete, self-compacting concrete, or self-leveling concrete and for the production of high strength and high-performance concrete. A superplasticizer, when added to the concrete ingredients, will not have any adverse effects provided it is of good quality and is used in accordance with ...
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Oct 02, 2016 · Influence of Superplasticizer Compatibility on the Setting Time, Strength and Stiffening Characteristics of Concrete. Muhsen Salam Mohammed 1, Salahaldein Alsadey Mohamed 2, Megat Azmi Megat Johari 3. 1 Department of Civil Engineering, College of Engineering, Zawia University, Zawia, Libya
Study of Mix Design For High Performance Concrete 109 3) Use of VSI metal & artificial sand clubbed with a powerful chemical admixture like Master Glenium 8855 provides freedom to the producer of concrete to limit water content in the mix and at the same time keeping water cement ratio as
• Superplasticizer for di˚erent types of cement • Dispersing agents for the processing of ceramics Customer Bene˜ts This modi˜ed product exhibits higher ˛uidity and slump retention compared to commercially available superplasticizers and remains e˚ective in medium with high concentration of sulfate ions.
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