Cement and Concrete Research_文献综述【化源网】 -


Fillers in cementitious materials — Experience, recent advances and future potential 10.1016/j.cemconres.2017.09.013 2018-03-27 The paper discusses the potential of fillers in CO2 mitigation in the cement industry. A historical overview of the use of fillers is presented as well as the limits of filler use given in cement standards. Globally, limestone filler currently represents only...
Modelling of transport processes in concrete exposed to elevated temperatures – An alternative formulation for sorption isotherms 10.1016/j.cemconres.2018.01.012 2018-01-19 There is a significant need to understand, analyse and assess moisture transport in cementitious materials exposed to elevated temperatures in order to confidently predict the behaviour and ultimately the development of damage in safety critical applications ...
Determining the free alkali metal content in concrete – Case study of an ASR-affected dam 10.1016/j.cemconres.2018.01.003 2018-01-17 In concrete affected by alkali–silica reaction (ASR), aggregates react in the high pH environment and cause deleterious expansion and cracking of the concrete. Leaching of alkali metals from the concrete might therefore locally reduce ASR. However, few data o...
Modelling of the sulfuric acid attack on different types of cementitious materials 10.1016/j.cemconres.2018.01.014 2018-01-17 A chemical-reactive transport model is used to simulate the sulfuric acid attack of cement pastes based on ordinary Portland cement (CEM I), blended Portland cements (CEM III, CEM IV, and CEM V), and calcium aluminate cement (CAC). This model accounts for the...
Relationship between the particle size and dosage of LDHs and concrete resistance against chloride ingress 10.1016/j.cemconres.2018.01.005 2018-01-17 The present study investigates the transport properties of cement mortar with Ca-Al-NO3 layered double hydroxides (LDHs). A co-precipitation method is applied to synthesize the Ca-Al-NO3 LDHs and the effect of the synthesis environment on the size and particl...
Natural fluorapatite as a raw material for Portland clinker 10.1016/j.cemconres.2018.01.006 2018-01-17 The present work focuses on the mineralogy and the reactivity of clinkers made from the integration of natural fluorapatite in the raw meals with percentages ranging from 0 up to15%. The samples were characterized by infrared spectrometry, X-ray diffraction a...
Development of silica-enriched cement-based materials with improved aging resistance for application in high-temperature environments 10.1016/j.cemconres.2018.01.004 2018-01-17 Understanding the effects of high temperature (HT) and high pressure (HP) conditions on the microstructure of cement-based materials is critical to the construction and safe operation of deep oil and gas wells. Under such conditions, the persistence of calciu...
Characterization of novel blast-furnace slag cement pastes and mortars activated with a reactive mixture of MgO-NaOH 10.1016/j.cemconres.2018.01.002 2018-01-12 This paper reports results of strength and reaction products of blast-furnace slag cements activated using a mixture of MgO-NaOH with a ratio 50/50 incorporated at 4, 6 and 8% relative to the slag mass. Pastes and mortars were prepared and cured at 20 °C and ...
Pore-size resolved water vapor adsorption kinetics of white cement mortars as viewed from proton NMR relaxation 10.1016/j.cemconres.2017.12.002 2018-01-10 The dynamic pore structure of partially saturated cement-based material is rather essential to quantify its mass transport and many other properties. To clarify the influence of water removal and re-entry, the low-field nuclear magnetic resonance technique is...
Limitations of the hydrotalcite formation in Portland composite cement pastes containing dolomite and metakaolin 10.1016/j.cemconres.2017.11.007 2018-01-10 This study focuses on the reaction of dolomite powder in combination with metakaolin in Portland composite cement pastes. We studied paste samples cured at 20 °C, 38 °C, and 60 °C for up to 1 year. In these systems, the only magnesium-containing hydration pha...

Fillers in cementitious materials — Experience, recent advances and future potential

10.1016/j.cemconres.2017.09.013

2018-03-27

The paper discusses the potential of fillers in CO2 mitigation in the cement industry. A historical overview of the use of fillers is presented as well as the limits of filler use given in cement standards. Globally, limestone filler currently represents only...

Modelling of transport processes in concrete exposed to elevated temperatures – An alternative formulation for sorption isotherms

10.1016/j.cemconres.2018.01.012

2018-01-19

There is a significant need to understand, analyse and assess moisture transport in cementitious materials exposed to elevated temperatures in order to confidently predict the behaviour and ultimately the development of damage in safety critical applications ...

Determining the free alkali metal content in concrete – Case study of an ASR-affected dam

10.1016/j.cemconres.2018.01.003

2018-01-17

In concrete affected by alkali–silica reaction (ASR), aggregates react in the high pH environment and cause deleterious expansion and cracking of the concrete. Leaching of alkali metals from the concrete might therefore locally reduce ASR. However, few data o...

Modelling of the sulfuric acid attack on different types of cementitious materials

10.1016/j.cemconres.2018.01.014

2018-01-17

A chemical-reactive transport model is used to simulate the sulfuric acid attack of cement pastes based on ordinary Portland cement (CEM I), blended Portland cements (CEM III, CEM IV, and CEM V), and calcium aluminate cement (CAC). This model accounts for the...

Relationship between the particle size and dosage of LDHs and concrete resistance against chloride ingress

10.1016/j.cemconres.2018.01.005

2018-01-17

The present study investigates the transport properties of cement mortar with Ca-Al-NO3 layered double hydroxides (LDHs). A co-precipitation method is applied to synthesize the Ca-Al-NO3 LDHs and the effect of the synthesis environment on the size and particl...

Natural fluorapatite as a raw material for Portland clinker

10.1016/j.cemconres.2018.01.006

2018-01-17

The present work focuses on the mineralogy and the reactivity of clinkers made from the integration of natural fluorapatite in the raw meals with percentages ranging from 0 up to15%. The samples were characterized by infrared spectrometry, X-ray diffraction a...

Development of silica-enriched cement-based materials with improved aging resistance for application in high-temperature environments

10.1016/j.cemconres.2018.01.004

2018-01-17

Understanding the effects of high temperature (HT) and high pressure (HP) conditions on the microstructure of cement-based materials is critical to the construction and safe operation of deep oil and gas wells. Under such conditions, the persistence of calciu...

Characterization of novel blast-furnace slag cement pastes and mortars activated with a reactive mixture of MgO-NaOH

10.1016/j.cemconres.2018.01.002

2018-01-12

This paper reports results of strength and reaction products of blast-furnace slag cements activated using a mixture of MgO-NaOH with a ratio 50/50 incorporated at 4, 6 and 8% relative to the slag mass. Pastes and mortars were prepared and cured at 20 °C and ...

Pore-size resolved water vapor adsorption kinetics of white cement mortars as viewed from proton NMR relaxation

10.1016/j.cemconres.2017.12.002

2018-01-10

The dynamic pore structure of partially saturated cement-based material is rather essential to quantify its mass transport and many other properties. To clarify the influence of water removal and re-entry, the low-field nuclear magnetic resonance technique is...

Limitations of the hydrotalcite formation in Portland composite cement pastes containing dolomite and metakaolin

10.1016/j.cemconres.2017.11.007

2018-01-10

This study focuses on the reaction of dolomite powder in combination with metakaolin in Portland composite cement pastes. We studied paste samples cured at 20 °C, 38 °C, and 60 °C for up to 1 year. In these systems, the only magnesium-containing hydration pha...