Effect of different curing methods on the compressive strength development of pulverized copper slag concrete Daniel M. Boakye . a *, Herbert C. Uzoegbo . a, Nonhlanhla Mojagotlhe . a, Moeti Malemona . a. a . Dept of Civil and Env. Engineering, University of the Witwatersrand, Private Bag 3, 2050, Johannesburg, South Africa . A R T I C L E I N F O
· Load should be applied gradually at the rate of 140 kg/cm2 per minute till the Specimens fails. Load at the failure divided by area of specimen gives the compressive strength of concrete. The water for curing should be tested every 7 days and the temperature of water must be at 27+-2oC. Minimum three specimens should be tested at each selected age.
This paper presents an experimental and modeling study on the influence of curing temperature (T) and relative humidity (RH) on the development of early‐age compressive strength of cement mortars introducing an RH factor γ RH into the age conversion factor of concrete, a modified maturity function was proposed considering both effects of T and RH on the mechanical properties of mortars.
· High-early-strength-concrete (HESC) made of Type III cement reaches approximately 50–70 % of its design compressive strength in a day in ambient conditions. Experimental investigations were made in this study to observe the effects of temperature, curing time and concrete strength on the accelerated development of compressive strength in HESC. A total of 210 HESC cylinders of …
Variation of Concrete Strength with Time. As per studies and researches, the compressive strength of the concrete will increase with age. Most researches were conducted to study the 28th-day strength of concrete. But in reality, the strength at 28th day is less compared to the long-term strength that it …
· Concrete specimens were selectively cured at both elevated and low temperatures with four different time points of 24-h curing, 0th–1st, 1st–2nd, 2nd–3rd, and 6th–7th days from the start of curing, while being standard cured at a reference temperature of 20°C for the remaining days except for the selective curing days. The compressive ...
· Steam curing concrete at temperatures greater than 140 degrees is not shown to significantly improve compressive strength development. Phase 3 – Constant-Temperature Steam Curing Phase 3 consists of holding the enclosure temperature constant – around 140 degrees – for 6-to-12 hours or until the concrete has reached the desired compressive ...
MATCHED CURING Temperature matched curing has been used in laboratory conditions from as early as 1931 when Davey carried out studies in Britain examining the effects of cement type, cement content and the effect of placing temperature on the strength development of TMC specimens compared to those cured at 17°C [2].
period. Fig. 12-2 shows the strength gain of concrete with age for different moist curing periods and Fig. 12-3 shows the relative strength gain of concrete cured at different temperatures. CHAPTER 12 Curing Concrete Fig. 12-1. Curing should begin as soon as the concrete stiffens enough to prevent marring or erosion of the sur-face.
The study present the effect of different curing methods on the compressive strength of concrete using Portland cement and finally identifies the most effective curing process for normal concrete. 3. MATERIALS The materials used in the preparation of Concrete are: 1. Cement 2. Fine aggregate i.e., Natural Sand 3. Coarse aggregate 4. Water
compressive strength of concrete. Because of this, external heat is usually applied to produce high early compressive strengths concrete products after 12 to 18 hours of curing. Temperature is critical to meeting the dual concerns of higher early strength or reduced curing time. These methods are called accelerated curing methods.
KEYWORDS: Casting temperatures,curing compressive strength, final set,initial slump, temperature effects. ABSTRACT: Concretes, made with two different cements, were cast in the laboratory at temperatures of 10,23 and 32°C (50, 73, and 90"F). The concrete mix design was held constant for each cement used in the study. Fresh properties,
· What is Concrete Curing? According to a report by ACI Committee 308, the American Concrete Institute defines "curing" as of "the process by which hydraulic-cement concrete matures and develops hardened properties over time."All concrete mixes technically cure in different lengths of time and to different levels of maturity. That being said, curing time and strength can be controlled ...
This study examines how the compressive strength of concrete containing high volumes of GGBS is affected by various high-temperature curing methods. To date, the compressive strength development of high-volume GGBS concrete according to various high-temperature curing conditions—includingdelayperiod,temperaturerise,peak
This study investigated the effect of improper curing methods on the strength development and durability of concrete with a low strength class concrete (C20) as a case study. The concrete cubes were cured for 7, 14 and 28 days under three different
· With continuous moist-curing of fresh concrete, there was no strength loss of concrete made at 35°C. FA concrete specimens that were under intermittent spray-water curing at 35°C in the laboratory (every four hours) for 7 days and then under ambient conditions gave increased compressive strength up to the time of testing i.e. 6 months.
Compressive strength for UHPC mixes in different curing regimes is illustrated in Table 4 and Figure 2. The strength values are the average of six test specimens and the standard deviation of strengths is shown in table 4. Compressive strength in the range of 1218-2027 kg/cm2 (17666-29399 psi) was obtained applying different curing conditions.
development of compressive strength, and other mechanical properties of concrete, under different curing temperatures [Lew and Reichard 1978a, 1978b]. In this early work, the initial concrete temperature was the same for all specimens, and specimens were moved into the different temperature chambers after molding had been completed.
ash ratio on the compressive strength. It was reported that both the curing temperature and the curing time influenced the compressive strength. The authors confirmed that the temperature and curing time significantly improves the compressive strength, although the increase in strength may not be significant for curing at more than 60 0 C.
strength of concrete. The experimental program involved casting and curing 25 concrete slabs of 750 x 750 x 300 mm which were kept in a room with monitored temperatures of 20°C, 10°C, 3°C, 0°C and -5°C. They concluded that the curing at near freezing temperature caused the formation of micro cracks up to 10 mm wide and 10 mm long.
In this experimental and analytic research, the strength development for various curing histories was investigated with particular regard to the influences of curing time points with given temperatures. For this purpose, four different points of curing time were considered with an individual interval of 24 h.
Compressive strength development of concrete with different curing time and temperature. Cement and Concrete Research 1998; 28(12): 1761-1773. [15] Marzouk H, Hussein A. Effect of curing age in high-strength concrete at low temperatures.
· The minimum period for curing concrete to attain maximum strength is 28 Days. For a clear understanding, check the below graph. From the above graph, it is clear that concrete attained 50% of its design strength when it cured for 3-7 Days. 75% of Compressive strength achieved in 14 days. 90% of Concrete design strength achieved in 28 days.
· The process of placing and curing concrete on-site requires precise temperatures so that the structural integrity of the concrete is not damaged. With SmartRock™, a wireless concrete temperature and strength measurement sensor, you no longer have to worry about ambiguous wait times. SmartRock delivers real-time, accurate data to your mobile ...
· It had been demonstrated that moist curing at ambient temperature is beneficial for strength development until 7 days based on the 28th day dry compressive strength. The effectiveness of moist curing was discussed on the light of the effect of accelerated curing temperature in moist and normal conditions of relative humidity.
· @article{osti_323687, title = {Compressive strength development of concrete with different curing time and temperature}, author = {Kim, J K and Moon, Y H and Eo, S H}, abstractNote = {In this experimental and analytic research, the strength development for various curing histories was investigated with particular regard to the influences of curing time points with given temperatures.
· Title: Modeling of Compressive Strength Development of High-Early-Strength-Concrete at Different Curing Temperatures Author(s): Chadon Lee, Songhee Lee, and Ngocchien Nguyen Publication: IJCSM Volume: 10 Issue: 2 Appears on pages(s): 205–219 Keywords: high-early-strength concrete, compressive strength, curing temperature. Date: 6/30/2016 Abstract: High-early-strength-concrete …
The final curing stage for concrete cylinders focuses on providing controlled and consistent moisture and temperature conditions for maximum strength development. When the concrete cylinders arrive at the testing lab, they should be logged into the laboratory''s concrete sample registry, removed from their molds, and placed into the final curing ...
DOI: 10.1016/S0008-8846(98)00164-1 Corpus ID: 136505598. Compressive strength development of concrete with different curing time and temperature @article{Kim1998CompressiveSD, title={Compressive strength development of concrete with different curing time and temperature}, author={J. Kim and Y. Moon and S.-H. Eo}, journal={Cement and Concrete Research}, year={1998}, …
The strength gain under winter curing condition was observed as slower. By keeping the water cement ratio low as 0.35, concrete containing GGBS up to 50% can achieve high early-age strength. GGBS concrete gains more strength than the PC concrete after the age of 28 day till 56 day. The mechanical properties of blended concrete for various levels
Summary. As part of an investigation on the effect of temperature on the crushing strength of concrete, tests have been carried out using 2 in. diameter by 4 in. long specimens made with ordinary Portland cement, river sand and gravel aggregate, having various mix proportions and water/cement ratios.
In all curing methods, the compressive strength of the concrete increases with age. The highest compressive strength at all ages was produced by immersion (water) curing. The average compressive strength of water cured concrete was 13.56w/mm 2 …
