Slump adjustment is a fact of life for concrete

water reducer or superplasticizer at the site to increase slump. Us i n g a d m i x t u r es maintains the water-cement ra t i o, but provides a work-able slump. If the concrete is at the maximum water-cement ra t i o, an a d m i x t u r e may be the only accept-able method of increasing slump. It’s best to add a superplasticize r

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PDF) Effect of Superplasticizer Dosage on Workability and Strength

29 Sep 2020 ... superplasticizer are obvious, i.e. to produce concrete with a very high ... Since concentration of superplasticizer is different, any comparison of.

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Effectiveness of Polycarboxylate Superplasticizers in Ultra

“Impact of superplasticizer concentration and of ultra-fine particles on the rheological behaviour of dense mortar suspensions.” Cement and Concrete Research, ... 由 J Plank 著作 · ‎2009 · ‎被引用 175 次 · ‎相關文章

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Study on the effectiveness of PNS and LS superplasticizers ... - Dadun

14 Jan 2016 ... In pure air lime mortars as compared with cement mortars, the absence of C-S-H phases, the high Ca2+ concentration and the large water.

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concrete superplasticizer, concrete superplasticizer

< Sponsored Listing China supplier Concrete & Mortar Admixtures for coating system Product description Polycarboxylate superplasticizer 1 Liquid and Powder (With new technology) 2.High water reduce rate 3. High slump retention 4.Stable Quality DK-100 is a specifically designed polycarboxylate superplasticizer which exhibits excellent dispersion performance while maintaining good retention ...

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High Strength High Performance Concrete-Using Fly Ash and

Title: High Strength High Performance Concrete-Using Fly Ash and Superplasticizer Admixture Author(s): R. Rivera, R. Davila, and A. Duran Publication: Symposium Paper Volume: 186 Issue: Appears on pages(s): 341-356 Keywords: admixtures; compressive strength; fly ash; slump loss; superplasticizer Date: 5/1/1999 Abstract: This paper give some results of flowing and high strength concretes using ...

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Influences of superplasticizer modification and mixture

The concrete with PCE was cast at ambient temperature of 6 °C and the slump flow diameters increased within the first hour from 600 mm to 660 mm. This ... 由 W Schmidt 著作 · ‎2014 · ‎被引用 67 次 · ‎相關文章

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Experimental Investigation on High Performance Concrete

High performance concrete, superplasticizer . and . silica . fume. I. INTRODUCTION. HPC is a construction material which is being used in increasing volumes in recent years due to its long term performance and better rheological, mechanical and durability properties than CC. HPC possess invariably high

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Research on The Polycarboxylic Slump Retaining Admixture Guo

higher characteristics has become a hotspot in the field of concrete admixture industry, the ... PH value was adjusted to 6.0 ~ 7.0 by 30% concentration of sodium.

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A thermodynamical and structural study on the complexation of

The long-term storage of high-level nuclear waste will be realized in deep ... The solubility of Am(iii) and Th(iv) in cement pore waters containing SPs has been ... For each temperature the superplasticizer concentration was increased ...

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Plasticizers for concrete: types and principle of action

The use of superplasticizers is important if the concrete solution is subjected to prolonged transport in hot weather. With their help, it is possible to achieve high mobility of the concrete composition, while it becomes more water resistant, elastic and durable.

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China Concrete Admixture Water Reducer Reducing Agent PCE

Product Description. CONCRETE ADMIXTURE water reducer reducing agent. liquid Powder flake. PCE Polycarboxylate Superplasticizer. 1.Polycarboxylate Superplasticizer Introduction. Polycarboxylate superplasticizer PCE is a is a environmental Concrete water reducing agent. It is a concentrated product. Due to high water reducing rate and low alkali content, it can be widely used in all kinds of high …

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Behaviour of Normal Concrete Using Superplasticizer under

2014年7月15日 — Colak [19] investigated the effect of latex concentration on the workability and strength characteristics of Portland cement pastes with and without ... 由 SNR Shah 著作 · ‎2014 · ‎被引用 14 次 · ‎相關文章

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s Analysis of superplasticizers used in concrete - Analusis

Despite increased interest in this field, the current knowledge seems insuffi- cient to explain rationally the incompatibilities observed between some ... 由 RJ Flatt 著作 · ‎1998 · ‎被引用 25 次 · ‎相關文章

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Selection of Superplasticizers for High-Performance Concrete

Superplasticizers are used to fluidify the concrete in the field. Most of the superplasticizers helped to maintain high slump values for a time of 30 to 45 minutes. But some of the Portland cement do no behave well with the use of superplasticizers. This problem is understood only by the detailed study on the mode […]

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Influence of three types of superplasticizers on ... - Hal

2010年2月4日 — Superplasticizers are polymers which added to concrete, increase the ... sulfate concentration is high enough and at the “plateau” value (Fig.7). 由 S Pourchet 著作 · ‎2006 · ‎被引用 21 次 · ‎相關文章

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High-range superplasticizer for precast concrete - BASF

overcomes this dependency and provides much improved slump retention and vastly increased final strength of concrete. The formerly unrivaled combination of ...

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Influences of superplasticizer modification and mixture composition

tween SCC and normal concrete is the high amount of superplast- icizer (SP) that is ... concentration in the solution, they showed that PCE adsorption is strongly ...

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Super plasticizer, Retarding admixture on Properties of Concrete

Index Terms— chemical admixtures, initial setting time, superplasticizer, workability. ... ing rate and bleeding capacity of concrete is increased with retarders [3].

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Superplasticizers - an overview | ScienceDirect Topics

The development of very effective dispersing agents (superplasticizers) in the 1960’s led to a rapid increase in the production of high strength concrete (HSC). Though there is no clear definition of what constitutes “high strength”, it is common to use the American Concrete Institute definition of HSC as concrete with a compressive strength greater than 55 MPa.

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