This study was conducted to assess the effect of gypsum amount in cement in the production of self-compacting concrete (SCC). It was found that, up to 15% replacement, the …

The production of cement retarder with FGD gypsum has a very br oad prospect, ... it is now believed that FGD gypsum will completely replace natural gypsum in construction …

The construction industry consumes large quantities of natural resources and simultaneously generates a considerable amount of construction and demolition waste (CDW). …

PG has the ability to replace natural gypsum as a cement retarder . In the process of cement hydration, the dissolved SO 4 2− of PG reacts with hydrated calcium aluminates to generate …

The present study is focused on clarifying the influence of waste gypsum (WG) in replacing natural gypsum (NG) in the production of ordinary Portland cement (OPC). WG taken from slip …

@misc{etde_21217168, title = {Use of waste gypsum to replace natural gypsum as set retarders in portland cement} author = {Chandara, Chea, Azizli, Khairun Azizi Mohd, …

scientific article published on 7 January 2009. Use of waste gypsum to replace natural gypsum as set retarders in portland cement Q43367087)

Chandara C, Azizli KAM, Ahmad ZA, Sakai E (2009) Use of waste gypsum to replace natural gypsum as set retarders in Portland cement. Waste Manage 29(5):1675–1679. …

Chandara C, Azizli KAM, Ahmad ZA, Sakai E (2009) Use of waste gypsum to replace natural gypsum as set retarders in Portland cement. Waste manag 29(5):1675–1679. …

Concrete Admixtures; Gypsum; Retarders / Fluidizers; Gypsum Retarders; Retardan®-200 P; Product Data Sheet Show all documents Retardan®-200 P Retarder for Calcium Sulfate …

The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO 4 ·2H 2 O) in cement with an alternative setting retarder, such as the industrial by …

gypsum as retarder additive of the Portland cement. Three stages were considered to achieve this goal. Firstly, it was carried out the characterization and comparison of FGD gypsum with …

This paper describes replacing natural gypsum with FGD gypsum as cement retarder, the influence on the working performance, compressive strength and admixture adaptability of …

Cement with admixtures of gypsum and FGD gypsum: 28-day compressive strength versus dihydrate and anhydrite content of a different origin. Fig. 1. Comparison of compressive …

Use of waste gypsum to replace natural gypsum as set retarders in portland cement Autores: Chea Chandara, Khairun Azizi Mohd Azizli, Zainal Ariffin Ahmad, Etsuo Sakai Localización: …

Recycled gypsum powder from waste drywalls is a new alternative that has been recently introduced for partial cement replacement in concrete for construction applications.

The utilization of citro- and desulphogypsum in the cement industry as set retarders was tested and compared with natural gypsum. Chemical gypsums were used in two different …

Effect of gypsum on cement by preparing four different batches of Ordinary Portland Cement (OPC) using same quality clinker, maintaing SO3 level of cement 2 +/- 0.05 % and …

OPC paste with a water cement ratio 0.4 to 0.5 was prepared by mixing 500 grams of ordinary Portland cement, a fixed amount of sugar of 0.02% by weight of cement with …

DOI: 10.1016/j.wasman.2008.11.014 Corpus ID: 10273888; Use of waste gypsum to replace natural gypsum as set retarders in portland cement. @article{Chandara2009UseOW, title={Use …

The formation process of desulfurization gypsum is completely different from natural gypsum. Natural gypsum is formed in a slow, long-term geological process. ... it can …

Various by-product gypsum such as phosphor-, fluoro-, citro-, boro-, titano-, tartare-, and desulphogypsum have chemical composition similar to the natural gypsum, but its use in …

The utilization of citro- and desulphogypsum in the cement industry as set retarders was tested and compared with natural gypsum. Chemical gypsums were used in two different …

desulfurized gypsum and natural gypsum, the more appropriate ratio is 1.0, and the setting time meets the setting time of cement when the mixing amount is 3%. Therefore, it is …