Influence of “MC-Bauchemie” Additions on the Fine-Grained Concrete Properties

2020 ◽  
Vol 309 ◽  
pp. 114-119
Author(s):  
Ekaterina S. Gerasimova ◽  
Elizaveta Gumirova
Keyword(s):  
Cement Stone ◽  
Hardened Cement ◽  
Fine Aggregate ◽  
Fine Grained ◽  
Concrete Properties ◽  
Concrete Mix ◽  
Materials Used ◽  
Effective Additive ◽  
Optimal Quantity

The paper is devoted to research of influence of “MC-Bauchemie” additions on the fine-grained concrete properties, namely compressive strength. The results of testing of fine-grained concrete made on the basis of two different natural sands are presented. Characteristics of the initial materials used in the work (Portland cement, sands and additions-plasticizers) are given. The basic methods of preparation of mixes and testing of hardened cement stone and concrete are described. The optimal quantity of the selected additions on the example of cement paste and stone are established. Mobility dependences of concrete mixes on a type and quantity of plasticizers are received. The dependence of the additions effectiveness on the mobility of the concrete mix on the quality of the fine aggregate is shown. It is established that the most effective additive is PowerFlow 3100, its optimal amount for obtaining fine-grained concrete on the basis of JSC “Kar’er Myisyi” sand is 0.2 %.

The Influence of Compressive Strength of EPS Concrete Using Fiberglass with Curing and Non Curing Treatment

2015 ◽  
Vol 747 ◽  
pp. 226-229
Author(s):  
Irpan Hidayat ◽  
Jemima Devina Halim
Keyword(s):  
Compressive Strength ◽  
Hydration Reaction ◽  
Fine Aggregate ◽  
Concrete Experience ◽  
Alternative Materials ◽  
Concrete Mix ◽  
Compressive Strength Of Concrete ◽  
Materials Used ◽  
Fiberglass Material

Concrete is a mixture of portland cement, fine aggregate, coarse aggregate and water, with or without additives which form a solid mass. The purpose of this study was to find and innovative method of producing concrete mix from solid waste material as alternative. The alternative materials used in concrete mix was fiberglass. Material reduction in the sand on the concrete can decreases the strength until the fiberglass material added and increase the compressive strength on concrete. The composition of fiberglass that used in this study was 0%, 0.5%, 1%, 1.5%, 2%, 2.5%. The methodology used is the design of concrete mix in according to SNI 03-2834-2000. The results are concrete with the addition of EPS can reduce the density and the compressive strength of normal concrete, concrete EPS was added to increase the value of compressive strength fiberglass. The addition of fiberglass in concrete EPS only on the variable of 0.5% - 1% fiberglass, if greater than 1%, the compressive strength of concrete decreased because the material has not homogeneous concrete during mixing. The largest density value of 10% EPS concrete with fiberglass on the concrete test 28 days is the concrete EPS 10% + 0.5% fiberglass by weight of the curing process and the type of 2127.73 MPa and compressive strength are the largest and EPS concrete with compressive strength amounted to 11.277 MPa. The addition of 10% EPS can reduce the compressive strength of concrete at 3.75%. The addition of fiberglass obtained with a percentage of 0.5% - 1% is the most effective additions so as to improve the quality of concrete by 0.74%. Concrete with compressive strength has a curing system which is much better than the non-curing concrete, because concrete experience of concrete hydration reaction process which takes place optimally.

scholarly journals Optimization of the Concrete Composition Mix at the Design Stage

2021 ◽  
Vol 7 (8) ◽  
pp. 1389-1405
Author(s):  
Liubov Lisienkova ◽  
Tatiana Shindina ◽  
Nina Orlova ◽  
Liudmila Komarova
Keyword(s):  
Empirical Equation ◽  
Design Stage ◽  
Fine Aggregate ◽  
Concrete Composition ◽  
Composition Design ◽  
Aggregate Fraction ◽  
Concrete Mix ◽  
Composition Optimization ◽  
Selection Of

The problem of the composition optimization of concrete mixes seems to be quite urgent as errors at the composition design stage can lead to problems of concrete at the stage of exploitation such as delamination, cracking etc. Reasonable selection of concrete mix components guarantees the required strength of concrete and reinforced concrete structures in the future. This paper investigates the influence of the concrete mix composition on the strength of concrete. Firstly, typical risks that can occur on the composition design stage have been identified through the experts' interviews. Secondly, this risks were associated with indicators and characteristics that can be tested experimentally. Running of several mathematical models has allowed to outline concrete mix parameters of highest importance and formulate an empirical equation for the dependence of the strength of the concrete mixture on the values of the coarse aggregate quality factor, the fine aggregate fraction and the consumption of the Portland cement has been proposed. As a result, a methodology for controlling the quality of concrete at the stage of the composition design has been formulated. Doi: 10.28991/cej-2021-03091732 Full Text: PDF

Concrete Mix Design Using Particle Packing Method: Literature Review, Analysis, and Computation

2021 ◽  
Vol 2 (1) ◽  
pp. 83-102
Author(s):  
Shreya Sunil Tolmatti ◽  
◽  
Sanskruti Jaywant Jadhav ◽  
Sakshi Satish Jadhav ◽  
Mayur M. Maske ◽  
...  
Keyword(s):  
Packing Density ◽  
Particle Packing ◽  
Fine Aggregate ◽  
Density Method ◽  
Correlation Curve ◽  
Concrete Mix Design ◽  
Concrete Mix ◽  
Concrete Quality ◽  
Paste Content

Particle packing technology is used to reduce the amount of cement in concrete by optimizing the concrete mix, resulting in more sustainable concrete. In this study, four different methods were used to determine the distribution of the mixture presented; packing density method, packing density method, IS code method, and packing density method. In the packing density method, the paste content that exceeds the voids will increase along with the increase in the quality of the concrete. In cases of packing density, the cement-water ratio decreases with the quality of the concrete. In the packing of too many trials, trials and tribulations should be carried out to achieve the ratio of water-cement and paste content for a certain grade of concrete. This correlation curve helps reduce the experiments involved in determining the ratio of semen and paste content for a given concrete quality. The water and cement contents for the packing density and the IS code method are almost the same for each particular concrete class. The workability of concrete achieved was more in the packing density method than the IS code method for the same concrete quality, because the water-cement ratio was slightly higher in the packing density method than the IS code method. The required fine aggregate particles are more in terms of packing density method compared to the IS code method. Therefore, more water and cement are required in terms of packing density. The correlation curve can be used to determine the ratio of water-cement and paste the content that exceeds the voids for a certain concrete quality

The Micro Silicon Additive Effects on the Fine-Grassed Concrete Properties for 3-D Additive Technologies

2019 ◽  
Vol 974 ◽  
pp. 131-135 ◽  
Author(s):  
Sergey V. Klyuev ◽  
A.V. Klyuev ◽  
E.S. Shorstova
Keyword(s):  
Mathematical Modeling ◽  
Silica Fume ◽  
Scientific Paper ◽  
Additive Technologies ◽  
Strength Characteristics ◽  
Additive Effects ◽  
High Quality ◽  
Fine Grained ◽  
Concrete Properties ◽  
Concrete Mix

The effectiveness of silica fume for the fine-grained concrete used for 3-D technologies is proved in the give scientific paper. The advantages of silica fume using for concretes are presented. The mathematical modeling is used for the fine-grained concrete high-quality compositions’ development. The effectiveness of silica fume has been proved by the studies. The increase in the strength characteristics of concrete with the addition of silica fume is explained by the active pozzolan reaction, which starts when the concrete mix is ​​mixed with water.

scholarly journals Fractal dimension of concrete mix gradation: a quantitative parameter for some concrete properties

2020 ◽  
Vol 307 ◽  
pp. 01049
Author(s):  
Soumia Kheira Sebsadji ◽  
Kaddour Chouicha
Keyword(s):  
Fractal Dimension ◽  
Design Method ◽  
Fine Fraction ◽  
Concrete Mixture ◽  
Fine Aggregate ◽  
Concrete Properties ◽  
Average Grain Size ◽  
Concrete Mix ◽  
Analytical Formulas ◽  
Coarse To Fine

This study is based upon the fractal feature of ideal Particle Size Distributions (PSD) suggested by numerous concrete mix designs, i.e. ideal PSD can be shown to be equivalent to a power law distributions EC(ϕi) ∝ ϕi− DF, EC(ϕi) is the number of grains of size greater than ϕi, and DF is a nonwhole number called fractal dimension. This fact allows us to analyze the solid skeleton of a concrete mix (all solid components of the mixture) as a fractal structure, thus to determine some of physical properties of the concrete mixture. For DF ranging from 2.5 to 3, and based upon many parameters of the concrete mix (as the granular range, the volumetric fraction of solids in the concrete mixture…), analytical formulas have been proposed relating DF and some properties of the concrete in the solid state. The required properties are the coarse-to-fine aggregate ratio, the fineness modulus of the sand fraction, the average grain size and volume of the fine fraction in the concrete mix. The focus of this research is to develop formulas by which concrete properties can be predicted knowing the concrete mix gradation, i.e. the mix design method used.

High-Quality Cement-Mineral Suspensions Using Stone Crushing Waste

2020 ◽  
Vol 992 ◽  
pp. 124-129
Author(s):  
E.A. Belyakova ◽  
R. Moskvin ◽  
V.S. Yurova
Keyword(s):  
Rheological Properties ◽  
Physicomechanical Properties ◽  
Cement Stone ◽  
Dispersed Phase ◽  
High Quality ◽  
Active Suspensions ◽  
Solid Ratio ◽  
Concrete Mix ◽  
Mineral Suspensions

The quality of concrete is determined by the physico-mechanical and rheological properties of the original components. Rheological properties depend on the amount and concentration of the rheological matrix. Cement-mineral matrices of modern high-quality concrete are rheologically active suspensions which allow to provide the necessary fluidity and mobility of the concrete mix, as well as the required strength of concrete. The multicomponent composition of the water-dispersed phase is represented by cement, stone flour and hyperplasticizer. The article presents the results of studies confirming the possibility of replacing finely ground quartz with other highly dispersed rocks, including stone-crushing waste. It was revealed that increasing in the concentration of the water-dispersed phase by 10% made it possible to reduce the water-solid ratio while maintaining the required mobility of the mixture, and in some cases improved the spreadability of the suspension by 3-13%. It was determined that the physicomechanical properties of reaction-powder concretes depend on the density and porosity of finely dispersed components to a greater degree.

scholarly journals Experimental Study of the Use of Pumice Sand in the Rigid Pavement

2019 ◽  
Vol 2 (1) ◽  
pp. 61-66
Author(s):  
Abdul Gaus ◽  
Imran Imran ◽  
Chairul Anwar ◽  
Liska Novianti
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Volcanic Glass ◽  
Fine Aggregate ◽  
Concrete Compressive Strength ◽  
Rigid Pavement ◽  
Concrete Mix ◽  
Pumice Sand ◽  
Compressive Strength Of Concrete

The Pumice sand is a bright colored butian type, containing foam made from glass-walled bubbles and usually referred to as silicate volcanic glass granules. This pumice sand can be used as a substitute for normal sand as fine aggregate in a mixture of concrete mix. Based on the characteristic test examination, it can be seen that in testing the characteristics of pumice sand to the specifications of normal sand in specific gravity testing and weight testing of quicksand obtained results that are smaller than the specifications of normal sand and absorption tests obtained results greater than specifications on normal sand. The results of the normal sand compressive strength at BN is 250.95 kg /cm2 while the results of the floating sand concrete compressive strength on BPA is 224, 965 kg /cm2. Based on the research it can be concluded that with the same quality of concrete, the quality of K-250 is different in comparison to the compressive strength of concrete in normal sand and pumice sand concrete shows almost the same results. Therefore, more in-depth research is needed regarding the use of pumice sand instead of normal sand in a mixture of concrete mix

scholarly journals Infrared spectr of SP–2VU superplastifying agent and a cement mortar with additive

2019 ◽  
Vol 81 (1) ◽  
pp. 289-293
Author(s):  
L. A. Vinogradova ◽  
Y. P. Rusakova
Keyword(s):  
Ir Spectra ◽  
Cement Mortar ◽  
Hardened Cement ◽  
Reinforced Concrete Structures ◽  
Chemical Additives ◽  
Concrete Composition ◽  
Concrete Properties ◽  
Concrete Mix ◽  
Concrete Quality ◽  
Technological Methods

To improve the concrete properties, various technological methods are used, the most accessible ones being the introduction of chemical additives into the concrete mixture, which can significantly reduce the costs level per unit of production; these additives improve concrete quality and effectiveness and reinforced concrete structures as well as increase their service life and buildings and structures in whole. This paper presents the results of studying the effect of introducing a superplasticizer with stabilizing effect of Polyplast SP – 2VU LLC Polyplast Novomoskovsk into concrete by analyzing the IR spectra of the additive in pure form and as part of hardened cement mortar (0.1–0.9%). Portland cement CEM I 42.5 B of Mordovcement OJSC was used as a binder; the aggregates were enriched with quartz sand from the Khromtsovsky deposit with a size of 2.4 and granite crushed stone of the Orsk deposit of 5–20 mm with water absorption of 0.2% . In the course of the work, the chemical composition of the additive SP2-VU itself and the hardened modified concrete composition were analyzed. Thus, the introduction of a modifier into a concrete composition leads to the change in its structure and strength characteristics. It was established with the help of IR spectra, that when the content of the additive in the cement mortar is 0.5%, a more ordered and stable hardened structure is formed. The reliability of the data obtained is confirmed by the identification of the main peaks. Due to the modification of concrete (at 0.3-0.5% in the concrete mix regulator concentration), the increase in the strength of the samples is more than 40%.

scholarly journals ANALISA KUAT TEKAN BETON MENGGUNAKAN PASIR APUNG

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Abdul Gaus ◽  
Imran Imran ◽  
Liska Novianti
Keyword(s):  
Compressive Strength ◽  
Specific Gravity ◽  
Volcanic Glass ◽  
Fine Aggregate ◽  
Concrete Compressive Strength ◽  
Concrete Mix ◽  
Pumice Sand ◽  
Compressive Strength Of Concrete

Pumice sand is a bright colored butian type, containing foam made from glass-walled bubbles andusually referred to as silicate volcanic glass granules. This pumice sand can be used as a substitutefor normal sand as fine aggregate in a mixture of concrete mix. Based on the characteristic testexamination, it can be seen that in testing the characteristics of pumice sand to the specificationsof normal sand in specific gravity testing and weight testing of quicksand obtained results thatare smaller than the specifications of normal sand and absorption tests obtained results greaterthan specifications on normal sand. The results of the normal sand compressive strength at BN is250.95 kg /cm2 while the results of the floating sand concrete compressive strength on BPA is224, 965 kg /cm2. Based on the research it can be concluded that with the same quality of concrete,the quality of K-250 is different in comparison to the compressive strength of concrete in normalsand and pumice sand concrete shows almost the same results. Therefore, more in-depth researchis needed regarding the use of pumice sand instead of normal sand in a mixture of concrete mix.

Fine-Grained Concrete for Repair and Restoration of Building Structures

2021 ◽  
Vol 1038 ◽  
pp. 317-322
Author(s):  
Alexandra Shyshkina ◽  
Alexander Shyshkin
Keyword(s):  
Rheological Properties ◽  
Operational Reliability ◽  
Optimal Combination ◽  
Cement Stone ◽  
Building Structures ◽  
Active Components ◽  
Fine Grained ◽  
Concrete Mixtures ◽  
Concrete Properties ◽  
Mineral Fillers

It is determined that the active components of modern concrete are active mineral fillers, such as microsilica, meta-kaolin, ash-bearing or compositions from them, as well as superplasticizers. The optimal combination of these additive modifiers allows you to control the rheological properties of concrete mixtures and to modify the structure of the cement stone in such a way as to provide concrete properties that provide high operational reliability of structures. However, they have certain disadvantages that hamper their widespread use. The purpose of the research is to determine the effect of reaction powders applied simultaneously with colloidal surfactant, on the strength of powdered concrete and the rate of its formation.

Sign in / Sign up

Export Citation Format

Share Document