The mechanical properties and electrochemical behavior of cement paste containing nano-MgO at different curing temperature

Song, Shiqi; Jiang, Linhua; Jiang, Shaobo; Yan, Xiancui; Xu, Nanping

doi:10.1016/j.conbuildmat.2018.01.011

Cited by 35 publications

(11 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, many researchers have begun to study the usage of many new concrete materials, especially nanomaterials, such as nano-kaolinite clay [18,19], nano-MgO [20], nano-silica [21,22], nano alumina [23], and graphene nanomaterials [24][25][26]. These experiments showed that nanomaterials have favorable effects on the mechanical properties of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Nanoplatelet on the Carbonation Depth of Concrete under Changing Climate Conditions

et al. 2021

View full text Add to dashboard Cite

Climate change has been unprecedented in the past decades or even thousands of years, which has had an adverse impact on the mechanical properties of concrete structures. Many researchers have begun to study new concrete materials. Graphene nanoplatelet (GNP) is an attractive nanomaterial that can change the crystal structure of concrete and improve durability. The aim of the present study was to investigate the effect of GNP (0.05%wt) on the carbonation depth of concrete under simulated changing climate conditions (varying temperature, relative humidity, and carbon dioxide (CO2) concentration), and compare it with ordinary concrete. When the concentration of CO2 is variable, the carbonation depth of graphene concrete is 10% to 20% lower than that of ordinary concrete. When the temperature is lower than 33 °C, the carbonation depth of graphene concrete is less than that of the control sample; however, above 33 °C, the thermal conductivity of GNP increases the carbonation reaction rate of concrete. When the humidity is a variable, the carbonation depth of graphene concrete is less than 15% to 30% of ordinary concrete, and when the humidity is higher than 78%, the difference in the carbonation depth between the ordinary concrete and the graphene concrete decreases gradually. The overall results indicated that GNP has a favorable effect on anti-carbonation performance under changing climate conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Nanoplatelet on the Carbonation Depth of Concrete under Changing Climate Conditions

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The application of nanomaterials has developed at an astonishing speed in recent years. The incorporation of nanomaterials has significantly changed cementitious materials properties, not only the workability of the fresh stage but also the development of mechanical properties and microstructures in the hardening process [20,21]. The addition of nano-SiO 2 (NS) significantly reduces the setting time of cement paste, promotes the formation of more hydration products [22,23,24] and improves the pore structure of concrete [25,26].…”

Section: Introductionmentioning

confidence: 99%

Influence of Nano-SiO2, Nano-CaCO3 and Nano-Al2O3 on Rheological Properties of Cement–Fly Ash Paste

Peng

Long

2019

Materials

View full text Add to dashboard Cite

Rheological curves of cement–fly ash (C–FA) paste incorporating nanomaterials including nano-SiO2 (NS), nano-CaCO3 (NC) and nano-Al2O3 (NA) at different resting times (hydration time of 5 min, 60 min, and 120 min) were tested with a rheometer. The rheological behaviors were described by the Herschel–Bulkley (H–B) model, and the influences of these nanomaterials on rheological properties of C–FA paste were compared. Results show that the types, content of nanomaterials and resting time have great influences on the rheological properties of C–FA paste. Incorporating NS and NA increases yield stress and plastic viscosity, and decreases the rheological index of C–FA paste. When the content of NS and NA were 2 wt%, the rheological index of C–FA paste was less than 1, indicating rheological behavior changes from shear thickening to shear thinning. Meanwhile, with rising resting time, yield stress and plastic viscosity increased significantly, but the rheological index decreased evidently, showing paste takes on shear thinning due to the rise of resting time. However, incorporating 3 wt% NC and the rising of resting time did not change the rheological properties of C–FA paste. These differences are mainly that the specific surface area (SSA) of NS (150 m2/g) and NA (120 m2/g) are much larger than that of NC (40 m2/g). The huge SSA of NS and NA consume lots of free water and these tiny particles accelerate the hydration process during resting time.

show abstract

“…In geotechnical engineering, deep mixing method is generally adopted to improve the strength of soil by adding cement to the soil [4][5][6][7][8]. The soft soil is reinforced to impart higher strength through a series of reactions between raw materials and curing agent [9][10][11][12][13][14][15][16]. In addition to the traditional cement curing agent, researchers are constantly looking for some novel materials such as nano materials to improve the bearing capacity of the soft soil layer [2,3,14,15,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…In the past few years, mathematical models have been adopted to study the stress-strain response of soils [23][24][25][26][27][28][29][30][31]. In term of the stress-strain behaviors of cemented soil, a large number of researches have been reported [2,3,5,6,[13][14][15][16][17][18][32][33][34][35][36][37]. However, the reported mathematical models have some limitations particularly in the modeling of the constitutive behavior of nano magnesia-cement-reinforced seashore soft soil (Nmcs) which manifests different stress-strain behaviors under varying conditions [2][3][4]17,18,38,39].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Models for Stress–Strain Behavior of Nano Magnesia-Cement-Reinforced Seashore Soft Soil

Wang

Zhang

et al. 2020

Mathematics

View full text Add to dashboard Cite

The stress–strain behavior of nano magnesia-cement-reinforced seashore soft soil (Nmcs) under different circumstances exhibits various characteristics, e.g., strain-hardening behavior, falling behavior, S-type falling behavior, and strong softening behavior. This study therefore proposes a REP (reinforced exponential and power function)-based mathematical model to simulate the various stress–strain behaviors of Nmcs under varying conditions. Firstly, the mathematical characteristics of different constitutive behaviors of Nmcs are explicitly discussed. Secondly, the conventional mathematical models and their applicability for modeling stress–strain behavior of cemented soil are examined. Based on the mathematical characteristics of different stress–strain curves and the features of different conventional models, a simple mathematical REP model for simulating the hardening behavior, modified falling behavior and strong softening behavior is proposed. Moreover, a CEL (coupled exponential and linear) model improved from the REP model is also put forth for simulating the S-type stress–strain behavior of Nmcs. Comparisons between conventional models and the proposed REP-based models are made which verify the feasibility of the proposed models. The proposed REP-based models may facilitate researchers in the assessment and estimation of stress–strain constitutive behaviors of Nmcs subjected to different scenarios.

show abstract

The mechanical properties and electrochemical behavior of cement paste containing nano-MgO at different curing temperature

Cited by 35 publications

References 29 publications

Effect of Graphene Nanoplatelet on the Carbonation Depth of Concrete under Changing Climate Conditions

Effect of Graphene Nanoplatelet on the Carbonation Depth of Concrete under Changing Climate Conditions

Influence of Nano-SiO2, Nano-CaCO3 and Nano-Al2O3 on Rheological Properties of Cement–Fly Ash Paste

Mathematical Models for Stress–Strain Behavior of Nano Magnesia-Cement-Reinforced Seashore Soft Soil

Contact Info

Product

Resources

About