Analysis of strength development in cement-treated soils under different curing conditions through microstructural and chemical investigations

Ho, Lanh Si; Nakarai, Kenichiro; Duc, Myriam; Kouby, Alain Le; Maachi, A. El; Sasaki, Takashi

doi:10.1016/j.conbuildmat.2018.01.112

Cited by 71 publications

(38 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may refer to the high rate of moisture content loss at early age, which may cause shrinkage of compressed stabilized earth samples, resulting in the loss of long-term strength. Similar phenomenon had been observed by L. S. Ho et al (Ho et al, 2018) in the case of sandclay mixture treated with OPC analyzed under drying conditions at 20˚C/60%RH.…”

Section: Unconfined Compressive Strengthsupporting

confidence: 88%

Cement stabilization effect on mechanical and hygric properties of compacted earth

Haffar¹,

Fabbri²,

McGregor³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

View full text Add to dashboard Cite

Experimental investigations were carried out in this work to evaluate the impact of stabilisation on the mechanical and hygric properties of a reference soil-cement couple. Unstabilized and stabilized soils with two amounts of cement were examined. Compacted earth samples were prepared at their optimum water content and dry density. The effectiveness of stabilisation were verified by simple compressive strength tests conducted on cylindrical samples at different ages of curing. In a second step, the water vapour resistance factor was determined following the so-called "wetcup" method at the age of 28 and 90 days. Then the moisture buffering value was measured according to the Nordtest protocol. On one hand, compressive strength had been shown a dependency on the cement amount and the curing age. On the other hand, it has been found that increasing cement amount increase the vapour resistance, but it has a limited impact on the measured MBV.

show abstract

Section: Unconfined Compressive Strengthsupporting

confidence: 88%

Cement stabilization effect on mechanical and hygric properties of compacted earth

Haffar¹,

Fabbri²,

McGregor³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

View full text Add to dashboard Cite

show abstract

“…Based on the references [ 49 , 50 , 51 , 52 ], pores with diameter smaller than 500 nm are micropores and mespories, and pores with diameter larger than 1000 nm are large capillary pores. Hence, pores are classified into three types according to the pore size in this study: (1) type I: < 500 nm; (2) type II: 500–1000 nm; (3) type III: > 1000 nm.…”

Section: Resultsmentioning

confidence: 99%

Quicklime and Calcium Sulfoaluminate Cement Used as Mineral Accelerators to Improve the Properties of Cemented Paste Backfill with a High Volume of Fly Ash

Ding

Zhang

2020

Materials

View full text Add to dashboard Cite

In order to reduce the CO2 emission and cost of binders used in cemented paste backfill (CPB) technology, new blended binders with a large amount of fly ash (FA) were fabricated. Different doses of quicklime and calcium sulfoaluminate cement (CṠA) were used as mineral accelerators to improve the early workability of CPB. The effects of CṠA and quicklime on flowability, compressive strength, pore structure, hydration heat, and hydration evolution were investigated experimentally. The results showed that the addition of quicklime and CṠA reduced the spread diameter of the fresh backfill and improved the mechanical performance of the hardened CPB. With increasing quicklime and CṠA, the cumulative hydration heat of the blended binder distinctly increased in the first 6 h. CṠA improved the initial hydration by increasing the reactivity, and quicklime increased the hydration rate by activating FA. The blended binder (15% quicklime + 10% CṠA) with the lowest CO2 emission and cost had potential application in filling technology.

show abstract

“…The results analyzed in this research were total porosity, pore size distribution, and percentage of Hg retained at the end of the experiment. The pore size distribution was analyzed, taking into account the next intervals: <10 nm, 10–100 nm, 100 nm to 1μm, 1–10 μm, 10 μm to 0.1 mm, and >0.1 mm [ 39 , 40 ]. Two measurements were made on each type of mortar at the hardening age studied.…”

Section: Methodsmentioning

confidence: 99%

Microstructure and Durability Performance of Mortars with Volcanic Powder from Calbuco Volcano (Chile) after 4 Hardening Years

et al. 2021

View full text Add to dashboard Cite

One of the most popular ways to lessen the impact of the cement industry on the environment consists of substituting clinker by additions. The service life required for real construction elements is generally long, so it would be interesting to obtain information about the effects of new additions after a hardening period of several years. Analyzed here are the effects of the incorporation of volcanic ashes, coming from Calbuco volcano’s last eruption (Chile), as clinker replacement, in the durability and pore structure of mortars, after approximately 4 hardening years (1500 days), in comparison with reference specimens without additions. The substitution percentages of clinker by volcanic powder studied were 10% and 20%. The microstructure was characterized with mercury intrusion porosimetry and impedance spectroscopy. In order to evaluate the pozzolanic activity of the volcanic powder after 1500 days, differential thermal analyses were performed. Water absorption after immersion, steady-state diffusion coefficient and length change were also studied. In accordance with the results obtained, the 10% and 20% substitution of clinker by volcanic powder from the Calbuco volcano showed beneficial effects in the mortars after 4 years, especially regarding the microstructure and chloride diffusion, without noticeable influence in their water absorption.

show abstract

Analysis of strength development in cement-treated soils under different curing conditions through microstructural and chemical investigations

Cited by 71 publications

References 52 publications

Cement stabilization effect on mechanical and hygric properties of compacted earth

Cement stabilization effect on mechanical and hygric properties of compacted earth

Quicklime and Calcium Sulfoaluminate Cement Used as Mineral Accelerators to Improve the Properties of Cemented Paste Backfill with a High Volume of Fly Ash

Microstructure and Durability Performance of Mortars with Volcanic Powder from Calbuco Volcano (Chile) after 4 Hardening Years

Contact Info

Product

Resources

About