Effects of Surfactants on the Properties of Styrene/Methacrylate–Type Superplasticizer in Cement Paste

Negim, El‐Sayed; Ramli, Mahyuddin; Saad, Bahruddin; Bekbayeva, Lyazzat; Saleh, Muhammad Idiris

doi:10.1080/03602559.2011.553861

Cited by 8 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand concrete has limited properties such as low ductility and crack resistance associated with hardening [2] , and adding waste tire to concrete could enhance the toughness. [3][4][5][6] Substantial research was carried out on the application of polymers in concrete [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] . In many of the works waste tire rubber was added to the concrete as a substitute for fine or coarse aggregate [3][4][5][6][8][9][10][11][12][13][14][15][16][17][18][19] , while Ganjian et al [7] used waste tire powder as a replacement of cement.…”

Section: Introductionmentioning

confidence: 99%

Effect of Partial Replacements of Sand and Cement by Waste Rubber on the Fracture Characteristics of Concrete

Al-Tayeb

Bakar

Akil

et al. 2012

Polymer-Plastics Technology and Engineering

View full text Add to dashboard Cite

In this study, the influences of partial replacements of sand by fine crumb and crumb rubber particles, and cement by powder rubber, on the fracture characteristics of concrete were investigated experimentally. Specimens were prepared for 5%, 10% and 20% replacements by volume, for both sand and cement. Each case had three unnotched and notched specimens of size 600 mm Â 75 mm Â 150 mm; notches were 50 mm and 75 mm deep. The specimens were subjected to three points bending test in a computer-aided universal testing machine, and the fracture characteristics such as G IC , CMOD and G f were analyzed. It was observed that, in all proportions, the replacement of sand by fine crumb and crumb rubber increased the fracture properties; the increase of fracture properties by crumb rubber was more than that by fine crumb rubber. However the cement replacement by powdered rubber could improve the fracture factors, only for 5% and 10% replacements.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Partial Replacements of Sand and Cement by Waste Rubber on the Fracture Characteristics of Concrete

Al-Tayeb

Bakar

Akil

et al. 2012

Polymer-Plastics Technology and Engineering

View full text Add to dashboard Cite

show abstract

“…Variation of four indexes manifests that the mix of WRA effectively improved the workability of fresh CGCBM for the mixing of WRA which contributes to increase the Advances in Materials Science and Engineering electrostatic repulsion between molecules, decrease surface tension of interface between solid and liquid, and decrease the wetting angle. In this test, the two WRAs are strong electrolytes with negative charges; if they were mixed, the lipophilic group will actively adhere to the surface of cement and fly ash particles, and the hydrophilic group will direct to water molecules [26][27][28][29][30]. is directional arrangement of WRA molecules makes the surface of cement and fly ash particles absorbed with like charge and form water film with a certain thickness which prevent forming flocculated structure.…”

Section: Slump and Slump Flowmentioning

confidence: 99%

Performance of Coal Gangue‐Based Cemented Backfill Material Modified by Water‐Reducing Agents

Yao

Wang

Feng

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Coal gangue-based cemented backfill material (CGCBM) is developed for backfilling the goaf in coal mines. As fresh CGCBM slurry is generally transported into underground openings through a pipeline, and after hardening, it plays the role of supporting the overlying strata. The fluidity, stability, and mechanical (compressive strength) of CGCBM become the most important properties. Adding water-reducing agents (WRAs) is considered to improve the fluidity, stability, and mechanical properties of CGCBM, but there is a risk of increased bleeding. So, two types of WRA (naphthalene series (WRA1) and poly carboxylic acid (WRA2)) are used at different contents (1.0%-2% for WRA1, 0.2%–0.6% for WRA2) by mass of binder. Slump, slump flow, yield stress, and plastic viscosity test are used to evaluate the fluidity properties of CGCBM after adding WRA. Bleeding rate test is used to evaluate the stability of CGCBM after adding WRA. Compressive strength is the most important factor in measuring the mechanical properties. SEM and XRD tests are used to analyse the mechanism of strength change. Results show that the slump, slump flow, and plastic viscosity increase after adding WRA, which reduces the yield stress and improves the fluidity. The bleeding rate increases with the increase of WRA content, leading to a decrease in stability. Adding WRA increases the compressive strength, and it increases first and then decreases with the increase of the content at the later stage. Considering the effects of WRA on the fluidity, stability, and compressive strength properties of CGCBM, the reasonable content of WRA1 and WRA2 is 1.5% and 0.4%, respectively. The research results provide guidance for the design and preparation of CGCBM with favourable performance in practical production.

show abstract

“…Styrene/methacrylate copolymers play a key role in the family of polymers latex used in Portland cement [ 14 – 16 ]. Negim et al [ 17 ] showed that the rheological, physical, and mechanical properties of pastes are improved by using styrene/methacrylate polymer in the presence of different cosurfactants. These included DBSS/PVA and DBSS/POE.…”

Section: Introductionmentioning

confidence: 99%

Effects of Surfactants on the Properties of Mortar Containing Styrene/Methacrylate Superplasticizer

Negim

Кожамжарова

Khatib

et al. 2014

The Scientific World Journal

Self Cite

View full text Add to dashboard Cite

The physical and mechanical properties of mortar containing synthetic cosurfactants as air entraining agent are investigated. The cosurfactants consist of a combination of 2% dodecyl benzene sodium sulfonate (DBSS) and either 1.5% polyvinyl alcohol (PVA) or 1.5% polyoxyethylene glycol monomethyl ether (POE). Also these cosurfactants were used to prepare copolymers latex: styrene/butyl methacrylate (St/BuMA), styrene/methyl methacrylate (St/MMA), and styrene/glycidyl methacrylate (St/GMA), in order to study their effects on the properties of mortar. The properties of mortar examined included flow table, W/C ratio, setting time, water absorption, compressive strength, and combined water. The results indicate that the latex causes improvement in mortar properties compared with cosurfactants. Also polymer latex containing DBSS/POE is more effective than that containing DBSS/PVA.

show abstract

Effects of Surfactants on the Properties of Styrene/Methacrylate–Type Superplasticizer in Cement Paste

Cited by 8 publications

References 18 publications

Effect of Partial Replacements of Sand and Cement by Waste Rubber on the Fracture Characteristics of Concrete

Effect of Partial Replacements of Sand and Cement by Waste Rubber on the Fracture Characteristics of Concrete

Performance of Coal Gangue‐Based Cemented Backfill Material Modified by Water‐Reducing Agents

Effects of Surfactants on the Properties of Mortar Containing Styrene/Methacrylate Superplasticizer

Contact Info

Product

Resources

About