Interactions of polymers and organic admixtures on portland cement hydration

Chandra, Sulekh; Flodin, Per

doi:10.1016/0008-8846(87)90076-7

Cited by 154 publications

(53 citation statements)

References 17 publications

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“…Conner (1993) indicated that S-S with addition of cement-based binders is an established treatment technology for soils contaminated with inorganic compounds whereas relatively limited experience exists for its application to organic compounds, in particular petroleum hydrocarbons. Organic compounds retard the cement setting process and affect the cement hydration by retarding reaction via formation of a protective film around the cement grain, hindering the formation of calcium hydroxide (Chandra and Flodin 1987;Edmeades and Hewlett 1998;Montgomery et al 1991a;Sora et al 2002). Gussoni et al (2004) conducted experimental tests by proton nuclear magnetic resonance (NMR) imaging to investigate the cementation and hardening of cement in the absence and presence of organic compounds in soil.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Leaching Behavior of a Stabilized and Solidified Anthracene-Contaminated Soil

2018

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This paper presents an investigation into remediation of an anthracene-contaminated clay soil through experimental tests. Samples were prepared of uncontaminated and contaminated soil-cement with 20 and 30% cement. Unconfined compression tests (UCT) were conducted on the natural soil and soil contaminated with anthracene. In addition, similar tests were carried out on uncontaminated and contaminated soil-cement at different curing times. Leaching tests were also conducted on contaminated soil and

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Section: Introductionmentioning

confidence: 99%

Mechanical and Leaching Behavior of a Stabilized and Solidified Anthracene-Contaminated Soil

2018

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“…Chandra S, et. Al., [2] suggested that SBR latex increases the void-fi lling effect and bridging across the cracks, it also decreases the porosity and pore radius of the concrete. Furthermore, the transition zone in the concrete may be improved due to the adhesion of a polymer.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

Thirumurugan¹,

Sivakumar

2013

Archives of Civil Engineering

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Synthetic polymer latexes, such as styrene-butadiene rubber (SBR) latex addition in Portland cement has gained wider acceptance in many applications in the construction industry. Polymer-modifi ed cementitious systems seals the pores and micro cracks developed during hardening of the cement matrix, by dispersing a fi lm of polymer phase throughout the concrete. A comprehensive set of experimental test were conducted for studying the compressive properties of SBR latex polymer with crimped polypropylene fi bres at relative volume fractions of 0.1 and 0.3%. The results indicated that the addition of polypropylene fi bre has little effect on the reduction in the workability of concrete composite containing fl y ash and SBR Latex. Increase in polypropylene fi bres upto 0.3% V f showed increase in compressive strength upto 57.5MPa. The SBR concrete without fi bre showed an increase in strength upto 20 % compared to plain concrete. Test results also indicated that the compressive strength was increased in SBR fi bre concrete by means of an ordinary dry curing process than wet curing because of their excellent water retention due to polymer fi lm formation around the cement grains. On the contrary the compressive strength reduces for SBR fi bre concretes under wet curing compared to dry curing.

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“…The morphology of the C-S-H in the polymer-modifier appears to be slightly different, being less dense than that of the cement pastes. Chandra et al, [36] reported that the retardation effects of in cement/cement admixtures due to the interaction of Ca 2+ ions with chemical admixtures, which holds their action and causes the acceleration of early ettringite gel formation or inhibition of the conversion of ettringite to monosulphate (C 3 A. 3CaSO 4 .…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

The effect of terpolymer admixtures on physico-mechanical properties of cement pastes

Asadullah

Nisar

2014

IJBAS

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Three composition ratios of methyl methacrylate; (MMA), 2-ethylhexyl acrylate, (2-EHA), and methacrylic acid; (MAA) terpolymers were prepared via emulsion polymerization. The polymerizations were carried out at 80°C using potassium persulfate (KPS) as initiator. The terpolymers were characterized by FT-IR and 1 HNMR. The influence of these terpolymers on the physico-mechanical properties of Portland cement (PC) pastes was determined using various characterization methods such as rheological and consistency. The results showed that as the ratio of MMA increased in the terpolymers, the water of consistency decreased, while the initial and final setting times were elongated with the concentration of 2-EHA increases. The workability, combined water and compressive strength of the hardened cement pastes were raised, whereas the water absorption was reduced with increasing quantity of MMA in prepared terpolymers and leads to the reduction in the porosity of the cement pastes, it is due to generation polymer films between cement granules. The SEM images confirmed that the addition of the terpolymers to the cement pastes affected on shape or morphology and size of crystals of the formed hydrates.

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Interactions of polymers and organic admixtures on portland cement hydration

Cited by 154 publications

References 17 publications

Mechanical and Leaching Behavior of a Stabilized and Solidified Anthracene-Contaminated Soil

Mechanical and Leaching Behavior of a Stabilized and Solidified Anthracene-Contaminated Soil

Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

The effect of terpolymer admixtures on physico-mechanical properties of cement pastes

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