Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste

Li, Xiangyu; Liu, Yan Ming; Li, Wengui; Li, Chen Yang; Sanjayan, Jay; Duan, Wenhui; Li, Zongjin

doi:10.1016/j.conbuildmat.2017.04.058

Cited by 280 publications

(130 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Li et al 29 , the size of the capillary pores can be divided into three groups: (1) large capillaries or macropores (50-10,000 nm), (2) medium capillaries or large mesopores (10-50 nm), and www.nature.com/scientificreports www.nature.com/scientificreports/ (3) small capillaries or small mesopores (2.5-10 nm). Initial water sorptivity is considered to be mostly affected by macropores, while secondary sorptivity is influenced by small pores 21,29 . In the current study, F4 additive with micrometer-sized particles could fill macropores, more efficiently decreasing initial water absorption.…”

Section: Resultsmentioning

confidence: 99%

A comparative study on the mechanical, physical and morphological properties of cement-micro/nanoFe3O4 composite

Ghazanlou

Jalaly

Sadeghzadeh

et al. 2020

Sci Rep

View full text Add to dashboard Cite

in this study, fabrication of a composite containing the ordinary portland cement (opc) and magnetite (fe 3 o 4 ) micro/nanoparticles is reported. In the first stage, the cement paste samples with a fixed 0.2 wt.% Fe 3 o 4 additive in four different particle sizes (20-40 nm, 80-100 nm, 250-300 nm, and 1-2 µm) were prepared to check the effect of magnetite size. Magnetite was found to play an effective role in reinforcing cement matrix. The results showed that the cement paste reinforced by magnetite nanoparticles of 20-40 nm size range had the highest compressive, flexural, and tensile strengths compared to those of the other samples reinforced by larger particles. in the second stage, various amounts of the fe 3 o 4 nanoparticles of 20-40 nm size range were added to the cement to evaluate the influence of magnetite amount and find the optimized reinforcement amount. It was revealed that adding 0.25 wt.% Fe 3 o 4 nanoparticles of 20-40 nm size range, as the optimal specimen, increased the compressive strength, flexural strength and tensile splitting strength by 23-32, 17-25, and 15-19%, respectively, and decreased the electrical resistance by 19-31%.

show abstract

Section: Resultsmentioning

confidence: 99%

A comparative study on the mechanical, physical and morphological properties of cement-micro/nanoFe3O4 composite

Ghazanlou

Jalaly

Sadeghzadeh

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The strengthening mechanism of GO in cement matrix is attributed to the chemical reaction between -COOH groups attached on the GO flakes and calcium ions from calcium hydroxide present in cement; thus, a 3D network structure is formed. Moreover, graphene oxide promotes and accelerates the growth of cement hydration products due to the New Uses of Micro and Nanomaterials nucleation effect [46][47][48]. As a consequence of this 3D network, the microstructure of cement composites is visibly densified with a higher crystal growth and less prominent microcracks.…”

Section: Improvement Of Mechanical Properties and Durabilitymentioning

confidence: 99%

Nanomaterials in Structural Engineering

Krystek¹,

Górski²

2018

New Uses of Micro and Nanomaterials

View full text Add to dashboard Cite

Development of structural engineering, daring structures with record spans or heights, meets two serious obstacles-the limitations of traditionally used materials and the need of continuous monitoring of new structures subjected to complex loads, including those of dynamic nature. Considering the responsibility for the life of people and the budget of new structures, the need of constant monitoring is inevitable. This is why structural engineers seek for new solutions; among them, smart structures based on self-monitoring materials seem to be one of the most attractive proposals. It is still an unexplored area, but current research shows a high potential of the use of composites reinforced by carbon-based nanomaterials as self-sensing structural materials. Nanomaterials also influence other important features of structural materials, such as microstructure, mechanical, and transport-related properties. In this chapter, we present the state of art of the use of nanomaterials in structural engineering in various areas including mechanical and electrical properties as well as issues referring to durability.

show abstract

“…Li et al [16] discovered that the addition of 0.04 wt% GO could increase the compressive strength of silicate cement paste the most. Li et al [17] argued that the GO agglomerate could enhance the tensile property of cement-based materials. However, there are no consistent opinions on the enhancement effects of GO.…”

Section: Introductionmentioning

confidence: 99%

“…It was widely believed that GO can promote the hydration reaction of cement-based materials [25][26][27][28]. The pore structure and microstructure of cement-based materials doped with graphene oxide were also studied [17,29]. It was believed that GO can refine pore structure.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Shrinkage Behavior of Concrete-Containing Graphene-Oxide Nanosheets

Chen

Hua

et al. 2020

Materials

View full text Add to dashboard Cite

Graphene oxide (GO) has been widely used as an additive due to its numerous unique properties. In this study, the compressive strength, flexural strength and elasticity modulus of concrete containing 0.02 wt%, 0.05 wt % and 0.08 wt % GO, and its dry shrinkage performance have been experimentally investigated. After the sample preparation, apparatus for compression test and flexural test were used to test the relevant properties of concrete containing GO. The dial indicators were used to measure the shrinkage of samples. The results indicate that GO can considerably improve the compressive strength, flexural strength, and elasticity modulus of concrete at the concrete age of 28 days by 4.04–12.65%, 3.8–7.38%, and 3.92–10.97%, respectively, which are substantially smaller than the increment at the age of 3 d by 5.02–21.51%, 4.25–13.06%, and 6.07–27.45% under a water-cement ratio of 0.35. It was also found that GO can increase the shrinkage strain of concrete. For example, at the age of 60 days, 0.02 wt%, 0.05 wt% and 0.08 wt% GO can increase the shrinkage strain of ordinary concrete by 1.99%, 5.79% and 7.45% respectively under a water-cement ratio of 0.49. The study has advanced our understanding on mechanical and shrinkage behavior of concrete containing GO.

show abstract

Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste

Cited by 280 publications

References 46 publications

A comparative study on the mechanical, physical and morphological properties of cement-micro/nanoFe3O4 composite

A comparative study on the mechanical, physical and morphological properties of cement-micro/nanoFe3O4 composite

Nanomaterials in Structural Engineering

Mechanical Properties and Shrinkage Behavior of Concrete-Containing Graphene-Oxide Nanosheets

Contact Info

Product

Resources

About