Results 21 to 30 of about 3,209 (166)

Research on Flocculation of Cement Particles in Water [PDF]

open access: yesE3S Web of Conferences, 2021
Nowadays, workability is absolutely necessary for piping concrete, which is influenced by characteristics of structure of fresh cement paste. In this paper, the movement of particles in electric field and flocculent units at different W/C were observed ...
Zuo Yanfeng, Zhang Yijie, Wang Dongmin
doaj   +1 more source

Supramolecular impactmechanism of polycarboxylate superplasticizers on controlled hardening building nanocomposites [PDF]

open access: yesНанотехнологии в строительстве, 2020
: Introduction. The use of modifying nano-additives in the production of binding building materials is one of the most effective ways to control the technological parameters of concrete by conducting good control of the rheological characteristics ...
Rauf M. Khalikov   +3 more
doaj   +1 more source

Dispersing Effect of Core Cross-linked Star Polycarboxylate Superplasticizers on the Cement Paste [PDF]

open access: yesE3S Web of Conferences, 2021
Researches on topological modification of polycarboxylate superplasticizers to improve the water-reducing or slump-retainning properties have been a hot topic in rencent years. Herein, a core crosslinked star polycarboxylate superplasticizers (SPCE) were
Zhang Jinlong   +4 more
doaj   +1 more source

Distribution of corrosion products at the steel-concrete interface of XD3 concrete samples

open access: yesMagazine of Civil Engineering, 2020
This research paper deals with the steel/concrete interface of concrete samples with and without green inhibitor (orange peel extract) and with different two types of superplasticizers (Mapei Dynamon SR 31 and Oxydtron) after an 18 months exposure in ...
Shaymaa Abbas Abdulsada   +2 more
doaj   +1 more source

A Mini Review on Properties of Portland Cement Concrete with Geopolymer Materials as Partial or Entire Replacement

open access: yesInfrastructures, 2021
The main aim of this paper is to review recent studies over the past 10 years investigating the influencing factors for improving the mechanical properties of concrete.
Kong Fah Tee, Sayedali Mostofizadeh
doaj   +1 more source

Effect of polycarboxylate admixture structure on cement paste rheology

open access: yesMateriales de Construccion, 2007
The purpose of the present study was to analyze the effect of the structural differences in four polycarboxylate and polyether admixtures on the rheological properties of cement pastes with different chemical and mineralogical compositions and different ...
M. M. Alonso   +4 more
doaj   +1 more source

Rheological study of interactions between MHEC and superplasticizers in aqueous solutions for applications in cement industry [PDF]

open access: yes, 2011
Innovative cement-based materials are characterized today by rather complex formulations. In particular, when cement pastes are considered, their formulation generally includes two different types of polymers: a rheology modifier (RM) (typically a ...
Nicodemi, Fabio
core   +1 more source

Investigating the Rheological Properties of Ultra High Strength Concrete Made with Various Superplasticizers [PDF]

open access: yes, 2019
Ultra-High Strength Concrete (UHSC) is a high-strength and highly ductile material formulated to provide compressive strengths exceeding 130MPa. UHSC materials typically have a very low water-to-cementitious ratio (w/cm), which requires the use of ...
Torres, Anthony   +3 more
core   +1 more source

Interparticle forces and superplasticizers in cement suspensions [PDF]

open access: yes, 1999
Placing of concrete requires much more water than the cement needs for its hydration. This results in a certain porosity in the hardened concrete, which facilitates chemical degradation of this material.
Flatt, Robert Johann
core   +2 more sources

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