Properties and the Hydration of Portland Limestone Cement With Diethanol-Isopropanolamine

Lu, Xiaolei

doi:10.13168/cs.2018.0016

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…It is well known that cement-based material is a nonhomogeneous and multiphase porous material [1][2][3]. e pore structure (including porosity and pore size distribution) and hydration reaction characteristics (including hydration degree, hydration product type, and quantity) are two key factors that affect the overall performance of cement-based materials [4][5][6][7]. Except for cement clinker, modern cementbased materials usually contain supplementary cementitious materials, such as slag and fly ash [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Role of Steel Slag Powder in Blended Cement Based on Quartz Powder as Reference

Zhao

Yang

2021

Advances in Civil Engineering

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To clarify the role of steel slag powder in blended cement, steel slag powders with different amounts and particle sizes were mixed into blended cement and the inert quartz powder was selected as the reference. The influences of steel slag powder with different amounts and particle sizes on the hydration and hardening properties of blended cement were studied from hydration heat, nonevaporable water content, porosity, hydration products, and strength. The results show that the influence coefficient of nonevaporable water content (ՓWn) of blended cement paste is in an exponential relationship with the amount of steel slag powder. Moreover, at a dosage of 30%, ՓWn of blended cement gradually decreases with the increase of steel slag particle size. Both the early and late compressive strengths of blended cement are in a binomial relationship with the amount of steel slag powder. The influence coefficient of steel slag powder on the compressive strength of blended cement is negative at the age of 3 days, whereas it is positive at the age of 28 days. The chemical filling effect of 30% steel slag powder with different particle sizes in the blended cement paste is very small, only 1.13%–5.06%. The hydration products of blended cement containing steel slag are mainly amorphous C-S-H gels and platy Ca(OH)2, and their density are consistent with the law of their porosity.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Role of Steel Slag Powder in Blended Cement Based on Quartz Powder as Reference

Zhao

Yang

2021

Advances in Civil Engineering

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“…Organic alkanolamines such as TEA, DEIPA, and TIPA are very efficient grinding aids and widely used. Often, for quality control and to predict and assess final product properties, contents of these alkanolamines in liquid raw materials of cement grinding aids have to be known [1][2][3][4]. However, these alkanolamines are very polar molecules and are very similar structurally (they differ in the CH 3 group amount and position).…”

Section: Introductionmentioning

confidence: 99%

Detection of Alkanolamines in liquid cement grinding aids by HPLC coupled with evaporative light scattering detector

Song

Shi

et al. 2021

Turk J Chem

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Triethanolamine (TEA), triisopropanolamine (TIPA), diethanol isopropanolamine (DEIPA) are necessary cement additives, and knowing their contents is needed for quality control and also to understand final properties of the cement. Whether it is the production of grinding aids, technical research and development or application research all involve the detection of grinding aids. This work developed a simple analytical technique for the simultaneous analysis of these alkanolamines in liquid cement grinding aids using high-performance liquid chromatography (HPLC) combined with evaporative light scattering detection (ELSD). HPLC was conducted by an XBridge C18 column (with dimensions 4.6 × 250 mm and 5 µm particles) using methanol and 0.1% trichloroacetic acid as mobile elution phases. The ELSD sprayer and drift tube temperatures were 60 ºC and 90 ºC, respectively. HPLC-ELSD developed in this work demonstrated 1) high sensitivity with limits of detection for the three analytes are 0.15, 0.54, 1.04 µg/mL; 2) good linearity with correlation coefficients equal to 0.997-0.999 over the tested concentration range; 3) excellent repeatability with intraand inter-day CV below 2.71% and 4) satisfactory accuracy with recovery in the 95.5-100.8% range. This novel method is a powerful, time-and cost-effective tool for alkanolamine analyses and quality control.

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“…In order to reduce the CO2 emission of the cement manufacturing, various technologies have been introduced to minimize the carbon footprint of finished cement [1,2] . Diethanol-isopropanolamine (DEIPA, C7H17NO3), a kind of novel alkanolamine, is primarily used as the cement grinding aids interground with the clinker like other alkanolamines such as triethanolamine (TEA) and triisopropanolamine (TIPA) [3,4] . Compared with TEA and TIPA, DEIPA is characterized with low corrosion to the human skin, thus it's safer to use from the perspective of safety and health.…”

Section: Introductionmentioning

confidence: 99%

Hydration Modification of Cement in the Presence of Diethanol-Isopropanolamine

Liao

Huang

et al. 2021

MSF

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In this investigation, calorimetry, quantitative X-ray diffraction analysis and the scanning electron microscopy were applied to explore the mechanism of hydration modification of cement with diethanol-isopropanolamine (DEIPA). It showed that the addition of DEIPA favoured the strength development on 3 and 28 days, but was undesirable for the 1d strength. The reason for this was that the dissolution of intermediate phase being promoted by DEIPA participated in the aluminate reaction interrupting the normal hydration of C3S. Appropriate adjustment on SO3 content in the cement was able to slow down the rate of aluminate reaction allowing C3S to react in a right fashion, which gave an optimum strength enhancement at early ages. The addition of DEIPA also impacted the formation of hydrates. Significant differences can be recognized in quantities, chemical compositions and the morphologies of hydrates in blank sample and the DEIPA-dosing ones. With the help of SO3 adjustment in cement with DEIPA, a great number of hydro-sulfoaluminates precipitated at the early stage of hydration to decrease the porosity of hardened cement pastes, which contributed to the strength gain of cement.

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Properties and the Hydration of Portland Limestone Cement With Diethanol-Isopropanolamine

Cited by 6 publications

References 27 publications

Investigation on the Role of Steel Slag Powder in Blended Cement Based on Quartz Powder as Reference

Investigation on the Role of Steel Slag Powder in Blended Cement Based on Quartz Powder as Reference

Detection of Alkanolamines in liquid cement grinding aids by HPLC coupled with evaporative light scattering detector

Hydration Modification of Cement in the Presence of Diethanol-Isopropanolamine

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