Experimental Development of the Use of Sodium Lignosulfonate as a Superplasticizer Additive in Mortars Used in Civil Construction | Chapter 4 | Chemical and Materials Sciences: Developments and Innovations Vol. 5

The use of stabilized mortar has increased in Brazil in recent years, as it provides greater productivity and rationality on construction sites. One of the greatest technological advances in the mortar business has been the development of new additives, which have been of great help to the civil construction industry. The main objective of this work was to analyze the influence of sodium lignosulfonate on the properties of self-leveling mortars using white cement, limestone and other additives. The repercussions from the addition of sodium lignosulfonate into the prepared mortar were evaluated by mass consistency assays, tensile strength and compression tests. The addition of sodium lignosulfonate negatively influences the fluidity of the mortar for addition values higher than 0.6% compared to white cement. However, for concentrations equivalent to 0.2% and 0.4% there is an increase in fluidity. There is a progressive increase in the compressive and tensile strength of the analyzed mortar, as it approaches its 28th day of mortar hydration, for additions of sodium lignosulfonate, respectively, at concentrations of 0.2, 0.4 and 0.6%, except for the concentration of 0.8%.

 

Author(s) Details

Fernando B. Mainier
Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

 

Jenifer C. de Souza Fassarela
Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

 

Renata Jogaib Mainier
Universo – Universidade Salgado de Oliveira, S. Gonçalo, Rio de Janeiro, Brazil.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v5/1648

Evolution of Ettringite and Thaumacite in Cement Stone | Chapter 9 | Current Innovations in Chemical and Materials Sciences Vol. 3

 The processes of hydration and thickening of cement systems are still individual of the urgent questions of modern construction materials science. In particular, this concerns the function of the expansive aspects of ettringite and thaumacite, especially in the late stages of building formation. The trouble lies in the reality that these two phases are isomorphic for each other and can transform into each one throughout the progress of cement stone. Many attempts have existed made by investigators from different nations to explain the type and mechanism of action of these fundamental neoplasms. In the course of numerous studies, it has happened found that under sure conditions in the vicinity of iron compounds and other polyvalent metals, ettringite does not cause hurtful phenomena in cement grain even in the late stages of hardening. In the presence of plasticizers, hydrogen and carbamide solutions play a certain role. However, distinctive attention command a price of to the processes of carbonation, sulfate and carbon dioxide disintegration and the introduction of carbonate supplements, which even in the attendance of two-water gypsum do not lead to the growth of the products of hydration and hydrolysis of cement. Experiments on strained carbonation of cement stone have existed carried out and the beneficial role of carbonate supplements, especially dolomite, the composition of hardening structures and endurance has been proved. The authors propose a science for the care of concrete later thermal liquid treatment by ownership products in an atmosphere of colorless odorless gas. It is shown that even in the demeanor of two-water gypsum secondhand as a cement setting retarder and plasticizer, carbonate supplements in combination accompanying sucrose and urea answers prevent concrete disintegration and increase the durability of cement plans.

Author(s) Details:

V. K. Kozlova,
Department of Building Materials, Polzunov Altai State Technical University, Russia.

A. V. Wolf,
Department of Technology and Mechanization of Construction, Altai State Technical University, Russia.

V. D. Zavadskaya,
Novosibirsk State University of Architecture and Civil Engineering, Novosibirsk, 630008, Russia.

S. V. Samchenko,
National Research Moscow State University of Civil Engineering, Moscow, 129337, Russia.

D. A. Afanasyev,
Director General of NIOST OAO «SIBUR», Tomsk, 634067, Russia.

N. P. Gorlenko,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

Yu. S. Sarkisov,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

Please see the link here: https://stm.bookpi.org/CICMS-V3/article/view/12598

On Some Peculiarities of Interaction between Cement and Water| Chapter 10 | Current Overview on Science and Technology Research Vol. 8

 The paper argues the most complex and poorly intentional aspects of interplay of cement with water. Particular consideration is paid to the earliest and last stages of hydration and structure establishment of binding system. It is proved that the induction periods of hydration and thickening are a multistage process including a pre-inference period and an inference period as such. Its part is decisive in the rainmaking technique of new phase beginning and the transfer of signs of the future structure from the supersaturated adhesive to the cement stone. At the definitive stage of hardening, a blood vessel porous carcass is formed in the cement-water system. It is proved that the hardening process endure be regarded as a characteristic phase transposition: water being a dispersion medium in the blood vessel-porous building of the cement stone in the beginning, becomes a dispersed time. Particle dispersion and atom size allocation and pore size dispersion are of particular importance. It has existed shown that many facets of interaction of cement with water have prevalent nature accompanying the processes taking place in terrestrial and biological objects of unaffected systems. It form possible to grant the mentioned processes in the soul of convergence and divergence of sciences.

Author(s) Details:

Ju S. Sarkisov,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

N. P. Gorlenko,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

O. A. Zubkova,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

N. N. Debelova,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

T. S. Shepelenko,
Tomsk State University of Architecture and Building, Tomsk, 634003, Russia.

Please see the link here: https://stm.bookpi.org/COSTR-V8/article/view/8667

Study on Wave Mechanism of Structure Formation in Cement Compositions | Chapter 03 | Novel Perspectives of Engineering Research Vol. 1

 The development of novel physicochemical analysis tools has opened up a world of possibilities for understanding the kinetics and mechanisms of structure creation in cement systems. The research of structure creation and cement hardening processes will allow for a wider range of control approaches and the development of sophisticated composite material production procedures. The goal of this project is to use digital technology to investigate the mechanism of structure building processes. The creation of alternating dark and bright concentric rings on the surface and in the bulk of the specimens is studied using an X-ray microtomography device. The creation of concentric rings is thought to be induced by acoustic vibrations in the cement-water system during the early phases of structure formation.

Author(S) Details

N. P. Gorlenko
Tomsk State University of Architecture and Building, 2, Solyanaya Sq., Tomsk, 634003, Russia.

Yu S. Sarkisov
Tomsk State University of Architecture and Building, 2, Solyanaya Sq., Tomsk, 634003, Russia.

V. I. Syryamkin
National Research Tomsk State University, 36, Lenin Ave., Tomsk, 634050, Russia.

L. B. Naumova
National Research Tomsk State University, 36, Lenin Ave., Tomsk, 634050, Russia.

A. N. Pavlova
Tomsk State University of Architecture and Building, 2, Solyanaya Sq., Tomsk, 634003, Russia.

B. I. Laptev
Nove Technologije, D. O. O. Ljbljana 1000, Sloveniya.

View Book:- https://stm.bookpi.org/NPER-V1/article/view/4360

Study of the Compressive Strength Characteristics of Cement Mortar Reinforced with Kenaf Fibre | Chapter 14 | Recent Trends in Chemical and Material Sciences Vol. 2

 Kenaf fibre is one of the various products derived from the kenaf plant, which is found in abundance in many places of the globe. The use of kenaf fibre to strengthen cement mortars as a building material yielded positive results in research. Cement mortar mixtures were proportioned to include 1-3 percent fibre volume and 10-30mm fibre length. The composite's performance is measured in terms of density, water absorption, and compressive strength. According to the findings, water absorption increased with fibre volume but remained within ASTM C 211-77 limitations. The density of the kenaf fibre cement mortar did not change significantly. There is no statistical difference between the means of the compressive strength of plain mortar and those containing 1-3 percent fibre volume at 10mm fibre length, according to an analysis of variance (ANOVA) at a 5% level of significance. The compressive strength data revealed a substantial link between fibre volume, fibre length, and curing age when regression models were built.

Author (S) Details

T. M. Omoniyi
Civil Engineering Department, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria.

Duna Samson
DG/CEO, Nigerian Building and Road Research Institute, Abuja, Nigeria.

Othman Musa Waila
Civil Engineering Department, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria.

View Book :- https://stm.bookpi.org/RTCAMS-V2/article/view/2915

Assessment and Investigation of Sugar Cane Bagasse Ash as a Binding Material for the Construction Industry | Chapter 5 | Modern Advances in Geography, Environment and Earth Sciences Vol. 3

 Sugarcane bagasse ash (SCBA) is a by-product of the sugar industry that is generated when sugarcane bagasse is burned to generate electricity. After all of the sugarcane's economically valuable sugar has been extracted, sugarcane bagasse is made. In factories that produce electricity from sugarcane, disposing of this material is a common environmental problem. Around 61,000 tonnes of SCBA are produced each year by Kakira Sugar Limited (KSL), but only about 30,000 tonnes are used, leaving the rest to be dumped, posing an environmental danger. The aim of this study was to see if bagasse ash could be used as a cement substitute in the construction industry. The concept of using SCBA as a building material has helped the sugarcane processing mills produce more cash flow. Chemical properties of bagasse ash samples obtained from KSL were investigated. The compressive strength of mortars containing ordinary Portland cement and SCBA in proportions of 0%, 10%, 15%, 20%, 25%, 30%, and 40% as a cement substitute was studied. Three replicates were made and tested, with bagasse ash replacing ordinary Portland cement in the above-mentioned proportions. At a test age of 28 days, the results showed that ordinary Portland cement can be substituted by SCBA up to 20% without affecting the compressive strength of the mortar. These findings indicate that substituting SCBA for cement may result in lower construction costs. As a result, it is safe to substitute cement with sugar cane bagasse ash up to 20% of the time.

Author(s) Details

E. Basika
Department of Agricultural and Bio-Systems Engineering, Makerere University, P.O.7062 Kampala, Uganda.

J. Kigozi
Department of Agricultural and Bio-Systems Engineering, Makerere University, P.O.7062 Kampala, Uganda.

N. Kiggundu
Department of Agricultural and Bio-Systems Engineering, Makerere University, P.O.7062 Kampala, Uganda.

View Book :- https://stm.bookpi.org/MAGEES-V3/issue/view/53