Influence of Superplasticizer S-3 on the Technological Properties of Concrete Mixtures

2014 ◽  
Vol 941-944 ◽  
pp. 780-785 ◽  
Author(s):  
Yury G. Barabanshchikov ◽  
Mihail V. Komarinskiy
Keyword(s):  
Chemical Composition ◽  
Air Entrainment ◽  
Concrete Mixture ◽  
Test Results ◽  
Technological Properties ◽  
Cement Concrete ◽  
Concrete Mixtures ◽  
Concrete Mix ◽  
Water Gain

In the process designing of concrete arise the problem - compatibility polycarboxylates with cement different parties. In some cases, when you receive the next batch of cement concrete mobility decreased sharply. Additive had to pick again. When choosing supplements examined its effect on the technological properties of concrete mixtures: workability, resistance to water gain, air entrainment. Test results showed that the addition of superplasticizer based on sulfonated naphthalene-formaldehyde resins (SNF) on the effectiveness of the plasticizing action is not inferior hyperplasticizer based polycarboxylate. Unlike polycarboxylates SNF additive has good compatibility with various cements, which provides stability regardless of the characteristics of the concrete mix to the vibrations of the chemical composition of cement. With increasing content of cement in the concrete superplasticizer efficiency increases, both in terms of workability, and in respect water gain of a concrete mixture.

scholarly journals Analysis of influencing factors of flow state concrete mixture performance

2021 ◽  
Vol 2076 (1) ◽  
pp. 012073
Author(s):  
Dandan Shi ◽  
Xing Qin ◽  
Hao Qu
Keyword(s):  
Measurement Method ◽  
Engineering Application ◽  
Performance Testing ◽  
Reducing Agent ◽  
Mineral Admixture ◽  
Raw Material ◽  
Concrete Mixture ◽  
Flow State ◽  
Test Results ◽  
Concrete Mix

Abstract Based on the principle of benefiting the durability of concrete, machined sand is used to configure C40 flow concrete, and the engineering application environment and economy are considered. In this paper, the author through the flow state concrete mix ratio design, give the raw material dosage, concrete mixing, finally combined with the workability measurement method, five groups of concrete mix performance testing. According to the test results, the influence of mineral admixture and water reducing agent on the workability of concrete mixture is studied and analyzed, and the reasonable admixture dosage and water reducing rate of water reducing agent and its admixture dosage are finally given.

scholarly journals Scaling Resistance and Air Void Characteristics in Concrete Containing GGBS

2016 ◽  
Vol 62 (4) ◽  
pp. 181-192 ◽  
Author(s):  
J. Wawrzeńczyk ◽  
A. Molendowska ◽  
T. Juszczak
Keyword(s):  
Frost Resistance ◽  
Air Entrainment ◽  
Test Results ◽  
Fundamental Factor ◽  
Air Content ◽  
Concrete Mixtures ◽  
Spacing Factor ◽  
Void System ◽  
Surface Scaling ◽  
Air Void

AbstractIn this paper we discuss the test results for concretes containing various amounts of ggbs as compared to concretes made with Portland cement. The main objective of these tests is to evaluate the influence of varying air content in such mixtures on the structure and frost resistance of concrete. The authors suggest that the approach presented here allows for a safe design of concrete mixtures in terms of their frost resistance.The results indicate that concrete can be resistant to surface scaling even at the W/C ratio markedly higher than 0.45. Increased addition of ggbs leads to a decrease in concrete resistance to surface scaling. Proper air entrainment is the fundamental factor for frost-resistant concrete, and the air void system has to be assessed (micropore content A300, spacing factor $\overline L $). The addition of ggbs increases pore diameters, thus, to obtain the appropriate air pore spacing factor, micropore quantities introduced have to be increased.

scholarly journals Effect of Zeolite on the Compressive Strength of Concrete with Different Types of Cement

2022 ◽  
Vol 955 (1) ◽  
pp. 012002
Author(s):  
I Sudarsono ◽  
S I Wahyudi ◽  
H P Adi ◽  
M D Ikval
Keyword(s):  
Compressive Strength ◽  
Concrete Mixture ◽  
Test Results ◽  
Concrete Mixtures ◽  
Material Component ◽  
Optimum Proportion ◽  
Different Types ◽  
Increasing Demand ◽  
Type V

Abstract Concrete is a material component in coastal area construction. With the increasing demand for concrete for construction purposes, there have been various innovations in concrete mixtures to improve the quality of the concrete, including the compressive strength value of concrete. In the concrete mixture, the researchers also add additive to the concrete mixture, one alternative is natural zeolite which is widely found in the earth. Research by testing concrete samples with variations of the zeolite mixture 0%, 15%, and 25% uses cement type V. The test results are then compared with the results of other studies using different types of cement. Comparative studies of zeolite concrete test with different types of cement show that the optimum proportion of zeolite is around 10% to 20% of the weight of cement to get the best compressive strength value.

scholarly journals Pengaruh Serbuk Batu Kapur terhadap Uji Tekan Beton. (Hal. 13-20)

2019 ◽  
Vol 5 (4) ◽  
pp. 13
Author(s):  
Nurul Rochmah ◽  
Gede Sarya
Keyword(s):  
Concrete Mixture ◽  
Limestone Powder ◽  
Test Results ◽  
Compressive Test ◽  
Cement Powder ◽  
Concrete Mixtures ◽  
Pressure Test ◽  
Concrete Materials ◽  
Increasing Demand ◽  
Lime Powder

ABSTRAK Semakin banyaknya permintaan akan semen akibat dari pembangunan konstruksi yang memakai material beton semakin meningkat, mengakibatkan semakin lama harga semen mengalami kenaikan. Sehingga dalam penelitian ini untuk meminimalisir pemakaian semen dalam campuran beton, penggunaan semen disibstusikan dengan serbuk yang terbuat dari batu kapur. Dipilih batu kapur karena senyawa yang ada dalam batu kapur mirip dengan senyawa yang di kandung dalam semen. Adapun proporsi yang dipakai dalam substitusi ini menggunakan serbuk batu kapur dengan persentase kelipatan 5% mulai dari 0% sampai 20%. Dari Hasil Uji tekan diperolehuji tekan optimal dari variasi serbuk kapur dan serbuk semen adalah pada variasi 10% sebesar 12,7 N/m2. Kata kunci: campuran beton, optimal, semen, serbuk kapur, uji tekan ABSTRACT The increasing demand for cement as a result of the construction of construction that uses concrete materials has increased resulting in the longer the price of cement has increased. So that in this study to minimize the use of cement in concrete mixtures, the use of cement is discussed with powder made of limestone. Limestone is chosen because the compounds in limestone are similar to compounds contained in cement. The proportion used in this substitution uses limestone powder with a percentage of a multiple of 5% ranging from 0% to 20%. From the compressive test results obtained optimal pressure test from the variation of lime powder and cement powder is at a variation of 10% by 12.7 N/m2. Keywords: concrete mixture, optimal, cement, limestone powder, pressure test

scholarly journals Effect of Sugar Waste on Cement Concrete

2021 ◽  
Vol 9 (9) ◽  
pp. 1353-1360
Author(s):  
Shiv Kumar
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Sugar Content ◽  
Setting Time ◽  
Dosage Level ◽  
Air Entrainment ◽  
Test Results ◽  
Cement Concrete ◽  
Total Sugar Content

Abstract: This investigation deals with the effects of the sugar- waste (Molasses) on the cement concrete. Studies were carried out on a cement paste, the types of different mortar mixes and five types of different concrete mixes, with and without the use of molasses. Molasses is one among the four types of sugar waste and it contains 40-60 percent of total sugar content depending upon types of molasses. While other sugar waste are Bassage, pressed mud and Discharging water containing mud. Among these wastes first two contains 3 percent of sugar and three contains negligible percent of sugar. In the present work molasses was collected sugar mill name. The effects of different dosage level 0, 0.1, 0.25, 0.50, 0.75, 1.00, 2.00, 3.00, 4.00, 5.00 percent of the molasses by weight of cement were studied for standard consistency, setting time, water – reduction behavior and air – entrainment in fresh concrete. The studies were also carried out for 7-day and 28-day compressive strength of the mortar, 7-day, 28-day, 56-day and 91-day compressive strength for five types of concrete mixes, 14-day tensile strength and flexural strength of concrete for the dosage levels 0, 0.10, 0.25, 0.50 percent of molasses by weight of cement. This test results indicates that molasses acts as accelerator upto 0.50 percent dose and then becomes retarder. Also it is slightly a water reducer and air entraining agent. The compressive strength of mortar, concrete, flexural strength and tensile strength of concrete get increased on using 0- 0.50 percent dose of molasses but the most favourable dose is 0.25 percent of molasses by weight of cement. Keywords: Air-entraining admixture, organic materials, microscopic bubbles, cohesion, durability, cavities

The Influence of Concrete Cover, Type of Wire Indentation and Concrete Mix on Bond between Steel and Concrete in Prismatic Prestressed Concrete Members

2021 ◽  
Vol 39 ◽  
pp. 103-126
Author(s):  
Adrijana Savić ◽  
Aref Shafiei Dastgerdi ◽  
Terry Beck ◽  
Robert J. Peterman ◽  
Aaron Robertson
Keyword(s):  
Prestressed Concrete ◽  
Concrete Cover ◽  
Concrete Mixture ◽  
Test Results ◽  
Cover Type ◽  
Minimum Value ◽  
Concrete Members ◽  
Material Characteristics ◽  
Splitting Test ◽  
Concrete Mix

This research was focused on evaluating the influence of the different variables that affectsplitting in prestressed concrete members, particularly prestressed concrete ties. These include the thickness of concrete cover, release strength of concrete, and the type of wire indentation. Different combinations of these variables can affect splitting. This research was focused on finding the best possible material characteristics to avoid potential failures in the field. The objective of this research was to set the minimum value of the thickness of concrete cover, for different wire types used in manufacturing having given types of aggregate for concrete mixture. The importance of this research was to identify the best materials and the best system (concrete, wire, cover) designs before the production of prestressed concrete ties. Splitting test results presented in this research were focusedon three different thicknesses of concrete cover, three different concrete mixes, a 4500psi concrete release strength, and seven different indented wire types.

Effect of Air-Entraining Agent LHD on the Technological Properties of Concrete Mix Containing Superplasticizer S-3

2015 ◽  
Vol 725-726 ◽  
pp. 419-424 ◽  
Author(s):  
Yuri Barabanshchikov ◽  
Mihail Komarinskiy
Keyword(s):  
Air Entrainment ◽  
Technological Properties ◽  
Water Separation ◽  
Chemical Additive ◽  
Slump Flow ◽  
Concrete Mix ◽  
Entrained Air ◽  
Air Entraining Agents ◽  
Positive Effect

Investigated coeffect of superplasticizer S-3 and air-entraining agents LHD (wood chemical additive) on workability, cohesion and air entrainment of concrete mix. Found that under introducing an additive LHD into the concrete mix comprising supeplastifikator S-3, the mobility of the concrete mix is reduced despite the fact that the additive LHD itself is a plasticizer. Decreased mobility from the introduction 0.1 % LHD makes: slump Abrams - 5-6 %, slump flow - 18-22 %. At the same time LHD additive contributes significantly air entrainment and reduce separating water and mortar. Effect of increasing the connectivity of the concrete mix associated with air entrainment. Regardless of the LHD additive S-3 additive does not reduces water separating, and does not have air-entraining action, and virtually no effect on air entrainment caused by the addition of LHD. With increasing content in the concrete mix additives LHD regardless of dosage S-3 amount of entrained air increases from 3 to 7%, and water separation is reduced to almost 0. Thus, synergy additives S-3 and LHD against plasticize the concrete mix was negative, but a positive effect has been observed in respect of connectivity concrete mix.

scholarly journals INFLUENCE OF THE GRANITE SCREENINGS TO THE PROPERTIES OF THE CONCRETE PAVING BLOCKS

2012 ◽  
Vol 4 (3) ◽  
pp. 89-95
Author(s):  
Mindaugas Laurinavičius ◽  
Mindaugas Daukšys ◽  
Albertas Klovas
Keyword(s):  
Mechanical Properties ◽  
Frost Resistance ◽  
Physical And Mechanical Properties ◽  
Concrete Mixture ◽  
Fine Aggregate ◽  
Technological Properties ◽  
Research Results ◽  
Concrete Mixtures ◽  
Better Than ◽  
Durability Of Concrete

The research deals with the granite screenings as fine aggregate influence on the technological properties of concrete mixtures and on the physical and mechanical properties and durability of concrete paving. The following several compositions of concrete mixture for the production of environment arrangements are researched: fine aggregate using only 0/2 fraction sand (B1), 10% of 0/2 fraction sand replacing with 0/2 fraction granite screenings (B2) and using only granite screenings (B3). Concrete mixtures were prepared in the laboratory, and concrete paving blocks – in the factory. The technological properties of concrete mixtures and physical and mechanical properties of concrete paving blocks (made from the mentioned concrete mixtures) were determined; the durability of the products in the cycles of frost resistance was forecasted. The research results reveal that due to the properly selected ratio between sand and granite screenings in the fine aggregate, the characteristics of concrete paving blocks are better than using only sand as fine aggregate.

Investigation of few Durability Parameters of Phospogypsum Concrete

2011 ◽  
Vol 374-377 ◽  
pp. 1778-1781
Author(s):  
Ajay L. Dandge ◽  
Vilas G. Meshram
Keyword(s):  
Production Cost ◽  
Air Entrainment ◽  
Industrial Wastes ◽  
Drying Method ◽  
Cement Concrete ◽  
Moisture Movement ◽  
Wetting And Drying ◽  
Concrete Production ◽  
Concrete Mix ◽  
Hardened State

Modern concrete is now common to use admixture (chemical or mineral), pozzolana’s for modifying different properties of concrete in fresh and hardened state. This paper presents the salient features of the development of Phosphogypsum(PG) Cement Concrete and discuss the improvements affected in the properties of concrete with the use of PG as an admixture compared to the plain or conventional cement concrete. This was accomplished by an experimental study by preparing different grades of cement concrete mix M20, M25 and M30 using PG as an admixture by replacing 5% of OPC and few durability parameters were investigated. This includes studying the compressive strength, workability, air entrainment and moisture movement by wetting and drying method. Study were conducted for modifying the properties of the concrete, controlling the concrete production cost, to overcome the scarcity of cement, and finally the advantageous disposal of industrial wastes.

Study of Rheological Properties of Modified Concrete Mixtures at Vibration

2019 ◽  
Vol 968 ◽  
pp. 96-106
Author(s):  
Oleksandr Pshinko ◽  
Olena Hromova ◽  
Dmytro Rudenko
Keyword(s):  
Mechanical Properties ◽  
Rheological Properties ◽  
Physical Nature ◽  
Concrete Mixture ◽  
Practical Significance ◽  
Vibration Displacement ◽  
Concrete Mixtures ◽  
Variable Quantity ◽  
Vibration Compaction ◽  
Mechanism Of Interaction

Study of rheological properties of concrete mixtures based on modified cement systems in order to determine process parameters. Methodology. To study structural-mechanical properties of modified concrete mixtures of different consistency at their horizontal vibrating displacement an oscillatory viscometer was designed. Results. The optimization of the process of vibration displacement of concrete mixtures with the specification of parameters of vibration impacts taking into account structural-mechanical properties of the mixture is performed. It has been established that the viscosity of the modified cement system of the concrete mixture is a variable quantity, which depends on the parameters of the vibration impacts. Scientific novelty. The mechanism of interaction of the modified concrete mixture with the form and the table vibrator during its vibration compaction is determined. On the basis of this, a model of concrete laying process control is proposed, that allows to predict the ability to form a dense concrete structure. Practical significance. Disclosed physical nature of the process of vibrating displacement of modified concrete mixtures using the principles of physical-chemical mechanics of concrete allows reasonably choose the best options for vibration impacts.

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