INSTIGATION ON MECHANISM OF LONG-TERM STRENGTH DEVELOPMENT OF CARBONATED CEMENT-TREATED SAND

This paper mainly explain and expounded folding compressive strength of the different types of sea sand mortar , fly ash to the sea sand concretes mortar intensity influence as well as the chloride ion content to the sea sand concretes mortar intensity influence. The pulverized fly ash has the postponement function to the sea sand concretes early strength, the chloride ion has the promoter action to the sea sand concretes early strength. 20% pulverized fly ash be good to the sea sand concretes long-term strength development influence, can achieve the goal which enhances the sea sand concretes the long-term strength . The chloride ion is greater to the concretes early strength influence, especially in previous 3 days. Along with the time development, the chloride ion influence weakens, but the pulverized fly ash enlarges to the concretes intensity's influence factor. A two-phase arrived, the final concrete strength values close to each other.

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Effects of Mixing and Curing Temperature on the Strength Development and Pore Structure of Fly Ash Blended Mass Concrete

Advances in Materials Science and Engineering ◽

10.1155/2017/3452493 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Ki-Bong Park ◽

Takafumi Noguchi

Keyword(s):

Fly Ash ◽

Portland Cement ◽

Pore Structure ◽

Weather Conditions ◽

Strength Loss ◽

Curing Temperature ◽

Strength Development ◽

Mass Concrete ◽

Term Strength

The aim of this work is to know clearly the effects of temperature in response to curing condition, hydration heat, and outside weather conditions on the strength development of high-performance concrete. The concrete walls were designed using three different sizes and three different types of concrete. The experiments were conducted under typical summer and winter weather conditions. Temperature histories at different locations in the walls were recorded and the strength developments of concrete at those locations were measured. The main factors investigated that influence the strength developments of the obtained samples were the bound water contents, the hydration products, and the pore structure. Testing results indicated that the elevated summer temperatures did not affect the early-age strength gain of concrete made using ordinary Portland cement. Strength development was significantly increased at early ages in concrete made using belite-rich Portland cement or with the addition of fly ash. The elevated temperatures resulted in a long-term strength loss in both belite-rich and fly ash containing concrete. The long-term strength loss was caused by a reduction in the degree of hydration and an increase in the total porosity and amount of smaller pores in the material.

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The Mechanism of Compressive Strength Development for Cement Pastes Cured at High Temperature and the Possibility of Additives as to Improve Long-Term Strength

Journal of the Society of Materials Science Japan ◽

10.2472/jsms.59.743 ◽

2010 ◽

Vol 59 (10) ◽

pp. 743-750

Author(s):

Hiroaki MORI ◽

Ryuichiro KUGA ◽

Haruka TAKAHASHI ◽

Masami UZAWA

Keyword(s):

Compressive Strength ◽

High Temperature ◽

Strength Development ◽

Term Strength ◽

Cement Pastes ◽

Compressive Strength Development

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Long-Term Strength Development of Controlled Low-Strength Material

ACI Materials Journal ◽

10.14359/11708 ◽

2002 ◽

Vol 99 (2) ◽

Cited By ~ 1

Keyword(s):

Strength Development ◽

Term Strength ◽

Strength Material ◽

Low Strength ◽

Controlled Low Strength Material

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Effect of Curing Method on the Strength Development and Freezing-Thawing Durability of the Concrete Incorporating High Volume Blast-Furnace Slag Subjected to Initial Frost Damage

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.962 ◽

2012 ◽

Vol 602-604 ◽

pp. 962-967 ◽

Cited By ~ 1

Author(s):

Kyung Taek Koh ◽

Gum Sung Ryu ◽

Jang Hwa Lee

Keyword(s):

Blast Furnace Slag ◽

High Volume ◽

Frost Damage ◽

Strength Development ◽

Term Strength ◽

Water Curing ◽

Early Strength ◽

Curing Method ◽

Furnace Slag

In the case of construction with high volume blast-furnace slag(BFS) concrete during winter season, the setting and hardening are drastically delayed, so it has a high risk of initial frost. Assuming that the concrete incorporating a high volume of BFS is affected by freezing at the early age during the winter conditions, then this study is to investigate the effect of curing method on the strength development and the resistance to freezing-thawing action. As a result, the concrete performing water curing at 5°C after subjected to initial frost damage improve the long-term strength and the freezing-thawing durability. The concrete implementing water curing at 30°C enhance the long-term strength and the resistance to freezing-thawing action as well as the early strength. However, the concrete with sealed curing at 30°C exhibits the improvement in the early strength, but not in the long-term strength and the freezing-thawing durability.

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