Based on the experimental results, it was known that the strength of 600 kg/m 3 concrete was slightly higher than that of ceramsite of size 20–30 mm. Increasing the ceramsite volume fraction was equivalent to replacing higher strength concrete with lower strength ceramsite, resulting in a decrease in compressive strength, plateau ...
The current study provided valuable insights into the compressive strength of concrete and the factors influencing the compressive strength. The key findings can be …
The compressive strength of concrete can be significantly increased with the addition of 1.0% formic acid. A more homogeneous and finer pore structure of concrete can be obtained with the incorporation of 1.0% formic acid, which may result in lower water absorption and higher compressive strength.
Stability of fresh ed concrete is controlled by type and volume of agent added. The compressive strength is a primary function of the desirable density design. …
Pore distribution is one of the important microscopic parameters affecting the strength of concrete. In general, concrete with narrower bubble distribution will have the higher strength . A review by Zhang et al. summarizes the effects of ing method on pore properties like size, volume, and shape, as shown in Table 5. It is ...
used as filler, it was r eported that the compressive strength of concrete was 1.7 and. 2.5 times higher on the 56th and 180th days compared to the 28th day [29].
A research has been undertaken to study the compressive strength of ed concrete with various concrete density. This paper reports experimental investigation on lightweight ed concrete of 300, 600, 800 and 1000 kg/m 3 densities and correlates compressive strength and density for further strength prediction. A total of 72 ed concrete …
[Show full abstract] properties of soil-based ed concrete. Dry density, 28-day compressive strength, and thermal conductivity and pore structure tests, were conducted to investigate the ...
The compressive strength of concrete determined at 28 days, ranges from 0.2 to 10N/mm 2 or can go higher. concrete is differentiated from air entrained concrete in terms of the volume of air that is entrained. The air …
Most of the concrete mixes collapsed within the first 2 to 4 hours after casting and only 2 out of 16 could be tested for compressive strength. In most cases, the plastic density was...
Porosity is considered to have a significant impact on compressive strength of concrete [].In this study, a strength-porosity model for concrete is developed by adopting the generalized model of Balshin which can be expressed similar to the form σ y = σ o (1−n) b.In the cellular concrete model of concrete made of neat cement paste used by …
The objective of this paper is to propose prediction relations for the compressive strength of concrete by extending two of the well-known relations available for cement paste, mortar and normal concrete, viz., …
In ed concrete, the compressive strength reduces with decreasing density. Generally, a denser ed concrete produces higher compressive strength and lower volume of voids. ... It was shown that the compressive strength of 20% dosage was highest with 8.8 MPa, followed by 25% (7.5 MPa), 30% (4.2 MPa), and 35% (3 MPa). As compared to ...
From the results of statistical analysis, Compressive Strength (CS) of FC is predicted using two different regression techniques: Ordinary Least Square Regression (OLS) …
Prediction of Compressive Strength of Sustainable Concrete Using Individual and Ensemble Machine Learning Approaches. ... Li M., Hao H., Shi Y., Hao Y. Specimen shape and size effects on the concrete compressive strength under static and dynamic tests. Constr. Build. Mater. 2018; 161:84–93. doi: 10.1016/j.conbuildmat.2017.11.069.
Compressive strength. The weight of concrete slabs and foundation backfill may imply that the highest strength insulation makes the most sense. For many jobs, though, products with less compressive strength are more than sufficient and can reduce insulation costs. ... Additionally, rigid insulation drainage boards help reduce the ...
In this paper, we study the influence of density and the water–cement (W/C) ratio on the slurry fluidity, compressive strength, and water absorption of ed concrete (FC) and its mechanism of action, with the aim of proposing an optimal mix ratio for FC to reduce cement usage and carbon emissions in the construction industry and ensure the good overall …
ed concrete is a preferred building material due to the low density of its concrete. In ed concrete, the compressive strength reduces with decreasing density. …
More than 100 ed concrete specimens were experimentally tested in compression. Different behavior of s arising from different ing agents is observed. …
However, considering that the compressive strength of the concrete is expected to be very low, the load rate was set at 0.1 MPa/s, which was inspired by . 2.3.3. Thermal Conductivity. In this study, THB 100 …
This article delves into the presentation of statistical models utilizing three different methods—linear (LR), non-linear (NLR), and artificial neural network (ANN)—to predict the compressive strength of concrete. These models are formulated based on a dataset of 97 sets of experimental data sourced from prior research endeavors.
A testing program was conducted to investigate the compressive strength of concrete samples made with Bogdanka CMW. The testing program comprised 2 different plastic densities of 800 and 1000 kg/m 3, and CMW replacement values of 10 to 20%. A control specimen with 0% CMW was prepared for comparison. The specimens were denoted as FC8 …
However, it is showed that the compressive strength of ed concrete is related to its concrete density and the volume. A reduction in density exponentially and adversely affects the compressive strength (Nambiar . et al., 2006; Cong & Chen, 2015). For an example, ed concrete with densities of 600, 1000 and 1400 kg/m. 3
ed concrete, belonging to the wider class of lightweight concrete, is a special type of concrete that typically includes cement, water, preformed and fine sands, in conjunction with other sand-like fine particles such as fly ash or silica fume [1].The components mixed with the cement paste give rise to the development of a system of air-voids …
From the graph it is observed that according to Fig. 2, the most significant factor influencing the compressive strength of concrete is water, which has the highest positive correlation with the output variable and a correlation of 0.99. Cement and SF, on the other hand, have correlations of 0.97, whereas cement is negatively (− 0.97 ...
Geopolymer concrete (GFC) is created by incorporating pores into geopolymer slurry or mortar. The functional and mechanical properties, such as thermal insulation, compressive strength, and density, are influenced by the characteristics of the pores and the properties of their walls. In chemically ed GFC, ing agents mixed with the …
The compressive strength of the concrete specimens modified with magnetized water and regular tap water after 3, 7, 14 and 28 days of moist curing is shown in Fig. 8. As seen there, the compressive strength of all concrete specimens with magnetized water is higher than that of the specimens with regular tap water at all testing ages.
The compressive strength of the concrete varies from 0.1 MPa -12 MPa. ... Combustibility of lightweight concrete based on natural protein ing agent. Article. Full-text available.
Falliano et al. [15, 16] investigated the influence of ing agent on compressive strength of concrete and found that the ing agent nature (synthetic versus protein) affect the strength ...
The results showed an increase in concrete compressive strength of 1.6% and flexural strength of 6.8% due to a 15% Granite Pulver (GP) in the mixture. A mixture of concrete with polypropylene fibres [15] fly ash and silica …
concrete is a promising material in building and construction applications, providing such outstanding properties as high specific strength, excellent thermal insulation, and effective acoustic absorption in human …
1. Introduction. ed Concrete (FC) is a kind of lightweight concrete which traps air inside the cement paste by virtue of ing agent [1].It possesses the advantages of high fluidity, low cement content, low aggregate consumption, good heat insulation performance, and light-weight nature [2, 3].It also has some disadvantages, such as low strength, poor heat …
The compressive strength of both the ed concrete had an increasing trend with a rise in density however the protein-based ed concrete showed better results i.e., 13% higher strength than ...
The paper reports a state-of-the-art review of concrete in terms of its components, manufacturing and material properties like drying shrinkage, compressive strength, stability and pore ...
Pre‐cast and in‐situ ( generator and concrete mixer) Pre‐cast, prepared with auto‐claves of high pressure and with steam cistern: Manufacturing brick kilns managed by extruder: Pre‐cast, stationary or in‐situ: Pre‐cast, stationary or in‐situ: Compressive strength, MPa: Up to 58 [57] Up to 12.0: 7.5–20: Up to 42.5: 30–150 ...
strength of the resultant concrete will be drastically reduced. Kearsley and Visagie [1999] reported that, using unclassified fly ash, of which around 40% of the particles have diameters exceeding 45 μm, the 56 day compressive strength of concrete with wet density of 1500 kg/m3 could achieve around 45 MPa,. Although the compressive ...
It was reported that for concrete the ratio of flexural strength to compressive strength varies between 0.2 and 0.4 which is higher than normal concrete (0.08 and 0.11) [112]. Narayanan and Ramamurthy [113] reported that the ratio of flexural strength to compressive strength ranges between 0.15 and 0.35 and, for concrete with density ...
The compression strength of concrete samples at different densities was tested at 28d. The results are shown in Fig. 2. The compressive strength of the four specimen groups all increased as the density became larger. With the density of 600 kg/m 3, the compressive strength of groups C1.5 and C2 decreased
At 120 days, the compressive strength of NFC decreases by 18.06% compared to that in clearwater, which far exceeds the limit of 15% loss of compressive strength of concrete with sulfate corrosion resistance properties as specified in JC/T1011-2006 [39]. M.
This section provides an analysis of the compressive strength of fi ber-reinforced concrete. This section presents a discussion on the impact of compressive strength of 7, 14, and 28-day ...