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The results showed that maximum value of compressive strength of concrete is in the addition of 0.45% baking powder with an increase in compressive strength of 6.43% of the nominal concrete ...
A total of 1030 sets of concrete compressive strength tests is collected to train and test the learners, in which the concrete mixture components (e.g., coarse/fine aggregates, cement, water, additive, etc.) and the curing time are set as the input data while the compressive strength value is set as the output data.
The use of polycarboxylate plasticizer in compositions with an increase in the amount of cement up to 15% and hyperplasticizer AR Premium up to 20% resulted in good early strength gain dynamics of ...
(PC) whereas there is a drop in compressive strength of about 4-70% for concrete with rubber content varying from 5- 50%. [10] In addition, the size of the rubber is another factor that affects the compressive strength of concrete with rubber additive compared to PC which shows an inverse relationship between the two variables. [10].
Concrete comprises high compressive strength but is weak in tension and can be reinforced with different types of fibres which benefits in improving the concrete's tensile strength to make it ...
This study was undertaken to compare the setting time and compressive strength (CS) of MTA Plus with various additives. Materials and Methodology: MTA Plus powder was mixed with following ...
The difference is mainly caused by the strength increase caused by the additional hydration of cement matrix products at the temperature range of up to 300 °C. The presented models do not account for this strength increase as it cannot be guaranteed, and thus, the models conservatively assume that the strength increase …
It results in high-strength and durable concrete structures. Superplasticizers are commonly used in projects that require self-consolidating or high-performance concrete. In modern construction, PCE and SM are often chosen as superplasticizers added to concrete. Accelerators. Accelerators are additives that hasten the setting and hardening …
Ans: Compressive strength is the applied pressure at which a given concrete sample fails. Whereas, Characteristic compressive strength would be that compressive strength below which not more than 5% of the samples are expected to fail. Thus atlas 95% of the samples have higher compressive strength than the …
Compressive Strength which are the strength propert ies with increase in eggshell ash content. The The California Bearing Ratio (CBR) increased from 26.45% to 56.19% and 82% to 93% at 6% and
High Performance Concrete Additives. Concrete additives are added to the mixture of water cement and aggregate in small quantities to increase the durability …
The tests considered for study are, slump test and compressive strength test The results show that the increase of superplasticizer dose in concrete leads to gain of good ability in addition to slump.
A 30 o F increase in mix temperature can cut setting time in half, increase water requirements, and reduce the 28-day compressive strength as much as 25%. A switch from ASTM C494 Type A to Type D water …
Understanding Additives in Concrete What Are Additives? Additives are substances added to concrete to alter its properties. They can improve workability, increase …
Concrete admixtures are liquids or powders which are added to the concrete during mixing in small quantities. The dosage is usually defined based on the cement content …
The compressive strength of lightweight concrete increases with bagasse content up to 15% and beyond this there is possibility of drastic reduction in strength and this 15% bagasse ash replacement ...
additives e.g. compression strength, flexural tensile strength, density (as light weight concrete) and their influences on concrete behavior. The additives included in this work are, rubber
Here's an overview of the types; A. Water Reducing Additives. These additives lower the water content, in the mix while maintaining its workability. This …
This study extensively examines the effects of introducing polypropylene fibers on the mechanical properties of high-strength concrete and develops predictive models for its compressive strength based on the mix proportions. The research is divided into two main parts. The initial section involves a thorough analysis of how …
They can increase the strength by 20-40% at the age of 28 days at dosages of 1.6-6% with a decrease in water-cement ratio and a decrease of cement amount by 20%. ... Additives highly increase the ...
of the variables in t he determination o f the compressive strength of concre te. In addition, M atlab R2017a soft ware is used for the design, training, and validation of the proposed ANNs.
Fillers can fill pores in concrete due to gaps from aggregates, if the empty space is reduced, the compressive strength value of the concrete will increase because the cavities in the concrete can ...
of High Strength Concrete Sven Mönnig, Pietro Lura Abstract This paper presents the results of freeze thaw resistance tests performed on a ref-erence mixture and a mixture with superabsorbent polymer (SAP) addition. The SAP mixture showed 40% less scaling than the reference mixture and a slight increase of the compressive strength.
1. Introduction1.1. General. For concrete to be good, it needs to be easy to work with. Different situations call for different levels of workability in concrete [1].High workability is needed for things like deep beams, thin walls of water-holding structures with a high percentage of steel reinforcement, column and beam junctions, tremie concreting, …
Abstract. The construction industry commonly uses steel-reinforced concrete despite the high levels of pollution in its production process. In this research, it was studied the dossing effect of nopal mucilage and Ixtle fiber as additives for the enhancement of concrete's mechanical properties: compression strength, flexural strength, heat …
Over 32.86% of the data had concrete with a compressive strength between 3.84 and 20 MPa, 42.54% had concrete with a compressive strength between 20 and 40 MPa, 14.9% had concrete with a compressive strength between 40 and 55 MPa, and less than 9.7% had concrete with a compressive strength between 55 and 72.48 …
Slag was utilized as an additive for fly ash-based geopolymers in this study. It was found that the incorporation of slag could significantly increase the compressive strength of the geopolymer. The compressive strength of geopolymer with 4.0% slag reached 50 and 70 MPa when cured for 14 days at 30 and 70 ° C, respectively. The …
Therefore, Artificial Neural Network (ANN), which is a computing system that simulates the human brain processes, can be helpful tool for prediction of the compressive strength of green concrete.
However, the increase in the compressive strength reported in this study is led to the incorporation of OPF as additive which enhanced the bounding between the concrete matrixes in lateral ...
The purpose of this study is to examine the mechanical properties of normal concrete, which include compressive strength and tensile strength, by adding fiber and ash additives.
The results of the study revealed that the optimum increase of compressive strength of 9.8% against the control concrete mix was achieved when a concrete mix of 10% RHA partial cement replacement ...
Their compressive strength, compared to standard-strength concrete, was raised by no less than 60 MPa after the standard 28-day period . The first report …
It has also been obtained that with increase in fly ash content, there is reduction in compressive strength of concrete. The optimum replacement of cement with fly ash is 30%. View full-text
Increase strength (compressive, tensile or flexural). Increase durability or resistance to severe condition of exposure. Decrease permeability of concrete. Control expansion caused by the reaction of alkalies with …