The utilization of beet molasses as a retarding and water-reducing admixture for concrete

Jumadurdiyev, Amanmyrat; Özkul, M. Hulusi; Saglam, Ali R.; Parlak, Nazmiye

doi:10.1016/j.cemconres.2004.04.036

Cited by 61 publications

(25 citation statements)

References 7 publications

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“…The traditional water-soluble admixtures employed as cement modifiers are cellulose derivatives including methyl cellulose, carboxymethyl cellulose and hydroxyethyl cellulose, polyvinyl alcohol, polyethylene oxide, polyacrylamide, etc [14]. The wide achievements of cement admixtures converted our attention to look for new suitable admixtures for cement which is the main objective of the study [16,17]. So, the main objective of the current paper is to study the effect of pulp black liquor, a byproduct from the pulp production industry, on the physico-mechanical properties and microstructure of OPC and PLC cements.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Pulp black liquor waste as a cement admixture

Darweesh¹,

Abdel-Kader²,

El-Meligy³

2013

International Journal of Basic and Applied Sciences

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The pulp black liquor waste (PBL), a byproduct from paper-making, is applied as a cement admixture in two types of cement, namely Ordinary Portland cement (OPC) and Portland limestone cement (LPC). The results showed that the water of consistency of cement pastes premixed with PBL was gradually increased with the concentration of PBL while the setting times (initial and final) were decreased. So, it can be used as an accelerator. The compressive strength increased slightly during the early ages of hydration but sharply during the later ages, particularly with those premixed with PBL. The combined water content and bulk density displayed the same trend as the compressive strength, whilst the apparent porosity decreased at all curing times. The IR spectra of cement pastes showed that the intensities of the different peaks of cement pastes with PBL are higher than those of the pure samples. The SEM images proved that the incorporation of PBL with cement did not affect the chemical composition of OPC or LPC hydrates, but it only affected the physical state, shape, size, morphology and crystallinity of the formed hydrates. The 2 wt. % of PBL is the optimum concentration.

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Section: Introductionmentioning

confidence: 99%

Utilization of Pulp black liquor waste as a cement admixture

Darweesh¹,

Abdel-Kader²,

El-Meligy³

2013

International Journal of Basic and Applied Sciences

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“…As it can be seen for low w/b ratio, UPV value of control is lower than others. Jacobsen and Sellevold, Bouzoubaâ et al and Jurnadurdiyev et al pointed out that the UPV values decreased with increasing w/b ratio. For instance, UPV values of control, 10% EPA, 10% PA, and AEA specimens vary 4,390, 4,388, 4,307, and 4,160 m/s for 0.35 w/b ratio, respectively.…”

Section: Resultsmentioning

confidence: 99%

The influence of lightweight aggregate, freezing–thawing procedure and air entraining agent on freezing–thawing damage

Karagöl

Yegin

Polat

et al. 2018

Structural Concrete

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This article presents the results of a study dealing with the concrete resistance to repeated cycles of freezing and thawing of nonair entrained, fine lightweight aggregate (LWA) and air‐entrained concrete when tested in accordance with ASTM C 666, procedures A and B. The water‐to‐binder ratios (w/b) of the mixtures ranged from 0.25 to 0.35, and the percentage of cement replacement by silica fume were 7% on a weight basis and constant throughout study. Binder dosage was 500 kg/m3 and constant. LWA was pumice aggregate (PA) and expanded perlite aggregate (EPA). PA and EPA were replaced by 10, 20, and 30% of total volume of 1 m3 as a fine aggregate (0–2 mm fine aggregate fraction). Also one group was produced with air entraining agent by 0.1% ratio of binder dosage. The 200 freeze–thaw cycles were carried out according to ASTM C666/C666M‐15, procedure A and B. The compressive strength, ultrasonic pulse velocity, relative dynamic modulus of elasticity and dry unit weight of mixtures were investigated. Based upon the analysis of the test data, it is concluded that samples contain air‐entrained agent and 10% LWA were more durable than that of control sample. With the increasing of the LWA content the freeze–thaw resistance of samples decreased. Thus, higher content of LWA is not recommended when it is to be subjected to repeated freeze–thaw cycles. Freezing–thawing procedures were compared with each other and found that procedure A was more severe than procedure B.

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“…At the curing period of 28 d, XRD patterns of CF-0 and CF-3 are shown in Figure 7. Some important phases in the process of the cement hydration reaction can be found in Figure 7 ( El-Didamony et al, 2012;Jumadurdiyev et al, 2005;Mendes et al, 2011). No new phases can be found in these XRD patterns, which indicates that the presence of CNFs cannot change the type of cement hydration products.…”

Section: Xrd Analysismentioning

confidence: 89%

Characterisation and simulation of highly dispersed carbon nanofibre-reinforced cement materials

Wang

Zhang

Ge³

et al. 2015

Advances in Cement Research

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In this work, carbon nanofibres (CNFs) were incorporated into ordinary Portland cement matrices. The mechanical behaviour of these composites and the effect of CNFs on cement hydration and microstructure of cement paste were compared with a plain cement sample by means of mercury intrusion porosimetry, X-ray diffraction, thermal analysis and scanning electron microscopy. The random distribution of CNFs in cement matrices was simulated by threedimensional Monte Carlo method. The results showed that the added 0 . 1 wt% CNFs increased the maximum flexural, compressive strength, toughness and impermeability performance of blended cement compared with the samples.The incorporation of CNFs into cement paste accelerated the rate of the hydration reaction and increased the amount of hydration products. The use of CNFs also improved pore parameters, and the pore size distribution of these composites shifted towards smaller pore size scope. In addition, scanning electron micrographs showed that good interaction between CNFs and the cement matrix occurs, with CNFs acting as fillers, resulting in a denser microstructure.

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The utilization of beet molasses as a retarding and water-reducing admixture for concrete

Cited by 61 publications

References 7 publications

Utilization of Pulp black liquor waste as a cement admixture

Utilization of Pulp black liquor waste as a cement admixture

The influence of lightweight aggregate, freezing–thawing procedure and air entraining agent on freezing–thawing damage

Characterisation and simulation of highly dispersed carbon nanofibre-reinforced cement materials

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