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reducing setting time of blended cement paste containing

Reducing setting time of blended cement paste containing ...

2018-7-1 Reducing the carbon footprint of the cement industry has become one of the main concerns of researchers in the field. This study explores different strategies to reduce the setting retardation effect of high-SO 3 fly ash (HSFA) on cement paste. The SO 3 phase was found to correspond to hannebachite (CaSO 3 0.5H 2 O). Chemical (calcium chloride), physical (fine

(PDF) Reducing setting time of blended cement paste ...

Reducing setting time of blended cement paste containing high-SO3 fly ash (HSFA) using chemical/physical accelerators and by fly ash pre-washing July 2018 Cement and Concrete Composites 90:14-26

Accepted by Cement and Concrete Composites, 2018.

Accepted by Cement and Concrete Composites, 2018. Reducing setting time of blended cement paste containing high-SO 3 fly ash (HSFA) using chemical/physical accelerators and by fly ash pre-washing Franco Zuninoa, Dale P. Bentzb, Javier Castroc a Laboratory of Construction Materials, EPFL STI IMX LMC Station 12, CH-1015 Lausanne, Switzerland.

Reducing setting time of blended cement paste containing ...

2018-8-1 Reducing the carbon footprint of the cement industry has become one of the main concerns of researchers in the field. This study explores different strategies to reduce the setting retardation effect of high-SO3 fly ash (HSFA) on cement paste. The SO3 phase was found to correspond to hannebachite (CaSO30.5H2O).

Setting Time and Consistency of Plain and Pozzolan

The blended cement containing PP and FA exhibited longer initial and final setting times when compared with the refer- ence paste. ... View in full-text Similar publications

Water resistant blended cements containing flue-gas ...

2019-10-1 Initial setting times for blended cement pastes Fig. 6 shows that the initial setting times for all the pastes, which could be retarded to more than 45 min and increased with higher water content. For the same water/binders ratio and FGDP content, it always increased with lower FA: OPC ratio (i.e., lower amount of FA and higher amount of OPC).

Reducing environmental impacts and carbon emissions:

2018-9-20 From Fig. 4, the superfine cement in blended cement reduces the initial and final setting times of mixtures, compared to the reference cement in blended cement. The initial and final setting times for S-70 are close to those of the reference cement, which suggests that S-70 mixture is beneficial for engineering applications compared to ...

Effect of air entrainment on shrinkage of blended cements ...

2015-11-30 In order to investigate the influence of air entrainment on shrinkage of blended cement concretes, it has been initially assumed that air content (A m) in concrete mixes should be the same as the optimum amount for frost-proof concretes which is 5.5% ± 0.5%.Moreover, the influence of air content within the range of 2–8% on OPC and 50% BFS cement concretes has

(PDF) Effect of Limestone Powders on Compressive

Results indicated a variation in both setting times for cement replacement from 2.5-12.5 wt.% except for 7.5 wt.% which experienced a retardation, whereas

The effects of CaCl2-blended acrylic polymer emulsion on ...

2018-3-17 Early-age hydration of paste and mortar flow. The hydration temperature profile, its first derivative and the measured initial and final setting time of mixtures are shown in Fig. 1a–c. As expected, CP did not only eliminate setting time retardation, the slight shift to the left of the temperature profile plots of the CP blended mixtures shown in Fig. 1a indicates that CP

Reducing setting time of blended cement paste containing ...

2018-3-20 Reducing the carbon footprint of the cement industry has become one of the main concerns of researchers in the field. This study explores different strategies to reduce the setting retardation effect of high-SO3 fly ash (HSFA) on cement paste. The SO3 phase was found to correspond to hannebachite (CaSO30.5H2O).

(PDF) Reducing setting time of blended cement paste ...

Reducing setting time of blended cement paste containing high-SO3 fly ash (HSFA) using chemical/physical accelerators and by fly ash pre-washing July 2018 Cement and Concrete Composites 90:14-26

Setting Time and Consistency of Plain and Pozzolan

The blended cement containing PP and FA exhibited longer initial and final setting times when compared with the refer- ence paste. ... View in full-text Similar publications

OPTIMAL CRITERIA OF ALGERIAN BLENDED CEMENT

2018-6-5 properties of the cement paste such as the water consis-tency, setting time, total porosity and compressive strength. The use of Portland cement containing limestone is a common practice in European countries. The recent European Standard EN 197 identifies two types of Port-land limestone cements (PLC): Type II/A-L containing

Properties of activated blended cement containing high ...

2018-8-20 It was observed that OPC exhibited shorter setting time than blended cements (PCC40, PCC45, PCC50 and PPC). This could be attributed to higher content of C 3 S and C 3 A phases in OPC than blended cements as shown in Table 1. C 3 S hardens rapidly in presence of water hence it is responsible for the early setting of cement paste [57, 58, 59].

High Volume Slag and Slag-Fly Ash Blended Cement

This paper presents the effect of nanosilica (NS) on compressive strength and microstructure of cement paste containing high volume slag and high volume slag-fly ash blend as partial replacement of ordinary Portland cement (OPC). Results show that high volume slag (HVS) cement paste containing 60% slag exhibited about 4% higher compressive strength than

Physico-chemical properties of nano metakaolin on the ...

2019-3-25 Blended cements containing 0, 5 and 10 wt% nano MK, were also studied. The hydration and the physico-mechanical characteristics of cement pastes were investigated by the determination of water of consistency (W/C, %), setting times (STs), combined water (Wn), free lime (FL), penetration of chloride (PC), and compressive strength (CS).

The effects of CaCl2-blended acrylic polymer emulsion on ...

2018-3-17 Early-age hydration of paste and mortar flow. The hydration temperature profile, its first derivative and the measured initial and final setting time of mixtures are shown in Fig. 1a–c. As expected, CP did not only eliminate setting time retardation, the slight shift to the left of the temperature profile plots of the CP blended mixtures shown in Fig. 1a indicates that CP

Effect of cement composition on the early hydration of ...

2016-12-8 Before the initial setting time, 20 g of blended cement paste was put in polyethylene containers, sealed, and cured at 20 °C. At 2, 7, 28, 90, and 365 days, paste fragments were ground and XRD analysis was performed on Philips PW 3710 diffractometer using CuKα radiation operating at 40 kV and 20 mA.

Portland, Blended, and Other Hydraulic Cements波特兰混合 ...

2017-3-8 Portland, Blended, and Other Hydraulic Cements波特兰混合和其他液压水泥.ppt,Portland, Blended, and Other Hydraulic Cements Oldest Concrete Found To Date dates around 7000 BC — a lime concrete floor found during the construction of a road at ...

Reducing setting time of blended cement paste containing ...

2018-3-20 Reducing the carbon footprint of the cement industry has become one of the main concerns of researchers in the field. This study explores different strategies to reduce the setting retardation effect of high-SO3 fly ash (HSFA) on cement paste. The SO3 phase was found to correspond to hannebachite (CaSO30.5H2O).

Reducing setting time of blended cement paste containing ...

2018-3-20 Reducing the carbon footprint of the cement industry has become one of the main concerns of researchers in the field. This study explores different strategies to reduce the setting retardation effect of high-SO 3 fly ash (HSFA) on cement paste. The SO 3 phase was found to correspond to hannebachite (CaSO 3 0.5H 2 O). Chemical (calcium chloride), physical (fine

Reducing setting time of blended cement paste containing ...

Reducing setting time of blended cement paste containing high-SO3 fly ash (HSFA) using chemical/physical accelerators and by fly ash prewashing By F Zunino, DP Bentz and J

OPTIMAL CRITERIA OF ALGERIAN BLENDED CEMENT

2018-6-5 properties of the cement paste such as the water consis-tency, setting time, total porosity and compressive strength. The use of Portland cement containing limestone is a common practice in European countries. The recent European Standard EN 197 identifies two types of Port-land limestone cements (PLC): Type II/A-L containing

Properties of activated blended cement containing high ...

2018-8-20 It was observed that OPC exhibited shorter setting time than blended cements (PCC40, PCC45, PCC50 and PPC). This could be attributed to higher content of C 3 S and C 3 A phases in OPC than blended cements as shown in Table 1. C 3 S hardens rapidly in presence of water hence it is responsible for the early setting of cement paste [57, 58, 59].

Assessment of mechanical and durability performance of ...

2021-10-25 The initial and final setting time of cement was noted as 113 and 245 min, with 32% consistency. The cement strength was found at 34.5 and 45.1 MPa, respectively, at 7 and 28 days. The granite processing sludge waste of specific gravity 2.19 was used in this study, collected from the nearby industrial area.

Investigation on the Role of Steel Slag Powder in Blended ...

2021-6-29 The results in Figures 7(a) and 7(b) show that the compressive strength of the blended cement paste containing steel slag powder at the age of 3 days is lower than that of the blended cement containing quartz powder, but the result is the opposite at the age of 28 days. The reason is that the quartz powder is an inert material and does not ...

PROPERTIES OF BLENDED CEMENTS WITH LIMESTONE

2009-12-18 The setting time is longer for the blended cements in comparison with Portland cement. An emphatic delay seems to be caused by the addition of fly ash (10-30%). The addition of limestone filler (10-20%) delays the initial setting time but the final setting time is just a little increased (C3-L10), or is not modified as compared to the reference.

Strength and chloride resistance of the blended Portland ...

2014-10-11 In this paper, the strength and chloride penetration resistance of the blended Portland cement mortar containing rice husk ash (RHA) and ground river sand (GS) were studied. Portland cement type I (OPC) was partially replaced with RHA and GS and a blended of RHA and GS. The mortar mixtures were made with OPC containing 0–40 % of RHA and GS. RHA and

Effect of cement composition on the early hydration of ...

2016-12-8 Before the initial setting time, 20 g of blended cement paste was put in polyethylene containers, sealed, and cured at 20 °C. At 2, 7, 28, 90, and 365 days, paste fragments were ground and XRD analysis was performed on Philips PW 3710 diffractometer using CuKα radiation operating at 40 kV and 20 mA.