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

2014 ◽  
Vol 68 (1) ◽  
pp. 523-528
Author(s):  
Makoto SHOJI ◽  
Minoru MORIOKA ◽  
Tomomi YOSHIDA ◽  
Kenichiro NAKARAI
Keyword(s):  
Strength Development ◽  
Term Strength

Study on the Strength of Sea Sand Concrete in Ningbo

2011 ◽  
Vol 250-253 ◽  
pp. 262-265
Author(s):  
Jun Zhe Liu ◽  
Guo Liang Zhang ◽  
Jian Bin Chen ◽  
Zhi Min He
Keyword(s):  
Fly Ash ◽  
Influence Factor ◽  
Concrete Strength ◽  
Chloride Ion ◽  
Strength Development ◽  
Term Strength ◽  
Two Phase ◽  
Sea Sand ◽  
Early Strength

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.

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

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
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.

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

2012 ◽  
Vol 602-604 ◽  
pp. 962-967 ◽  
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.

Long-term strength development of high-volume fly ash concrete

1990 ◽  
Vol 12 (4) ◽  
pp. 263-270 ◽  
Author(s):  
V. Sivasundaram ◽  
G.G. Carette ◽  
V.M. Malhotra
Keyword(s):  
Fly Ash ◽  
High Volume ◽  
Strength Development ◽  
Term Strength ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash

scholarly journals LONG-TERM STRENGTH DEVELOPMENT OF MODIFIED BELITE-BASED CEMENT CONCRETE AND ITS MECHANISMS

2004 ◽  
pp. 1-11
Author(s):  
Koji SAKAI ◽  
Moriaki KUMAGAI ◽  
Susumu YOSIDA ◽  
Hiroshi WATANABE ◽  
Seiichi SHIMOBAYASHI
Keyword(s):  
Strength Development ◽  
Term Strength ◽  
Cement Concrete

Long-term strength development of concrete in arid conditions

2001 ◽  
Vol 23 (4-5) ◽  
pp. 363-373 ◽  
Author(s):  
Husain Al-Khaiat ◽  
Nijad Fattuhi
Keyword(s):  
Strength Development ◽  
Term Strength ◽  
Arid Conditions
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