scholarly journals Waste Foundry Sand Usage for Building Material Production: A First Geopolymer Record in Material Reuse

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Neslihan Doğan-Sağlamtimur
Keyword(s):  
Compressive Strength ◽  
Building Material ◽  
Building Materials ◽  
Curing Temperature ◽  
Unit Weight ◽  
Wall Material ◽  
Sieve Analysis ◽  
Foundry Sand ◽  
Building Wall ◽  
Waste Foundry Sand

In order to bring a solution to the problem of waste foundry sand (WFS) in the foundry sector and achieve its reuse, geopolymer building material (as a cementless technology) was produced from the WFS for the first time in the literature in this study. The physical and mechanical characteristics of this material were determined. In the first part of the experimental step, the sieve analysis, loose/tight unit weight, and loss of ignition of the WFS were obtained as well as the ultimate analysis. In the second step, the water absorption percentage, porosity, unit weight, and compressive strength tests were conducted on the WFS-based geopolymer specimens activated by chemical binders (sodium hydroxide: NaOH and sodium silicate: Na2SiO3). As the unit weights of all the produced samples were lower than 1.6 g/cm3, they may be considered as lightweight building materials. The minimum compressive strength value for building wall materials was accepted as 2.5 MPa by national standards. In this study, the maximum compressive strength value was measured as 12.3 MPa for the mixture incorporation of 30% Na2SiO3 at the curing temperature of 200°C in 28 days. It was concluded that this geopolymer material is suitable for using as a building wall material.

scholarly journals Environmentally Friendly Geopolymer Building Material: Production, Determination of Physical-Mechanical-Radiation Absorption Properties and Mathematical Model Approach

2021 ◽  
Author(s):  
Neslihan DOGAN-SAGLAMTIMUR ◽  
Ahmet Bilgil ◽  
Sefa Ertürk ◽  
Vakkas Bozkurt ◽  
Elif Süzgeç ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Compressive Strength ◽  
Building Material ◽  
Power Plants ◽  
Building Materials ◽  
Thermal Power ◽  
Curing Temperature ◽  
Radiation Absorption ◽  
Unit Weight ◽  
Sieve Analysis

Abstract Waste ashes and radiation cause important environmental and health problems. Therefore, reduction of their amount is vital. In this study, physical-mechanical and radiation absorption (RA) properties of eco-friendly alkali (NaOH and Na2SiO3) activated geopolymer building material (GPBM) produced by using the industrial solid waste class F fly ashes (FFAs) are determined. The FFAs were supplied from thermal power plants operating in Zonguldak and Adana (Turkey). The sieve analysis, loose/tight unit weight and loss on ignition analysis of the FFAs was conducted. Different FFAs and alkali activator amounts were used for making GPBMs. After thermal curing in a laboratory oven at 70 °C and 100 °C, the produced GPBMs were kept to cool off to room temperature. Afterwards, compressive and flexural strengths, water absorption, porosity tests and RA measurements were performed. Influence of several parameters (FFA types, curing temperature and alkali ratios) on the RA properties of GPBM is discussed in this paper. According to the mathematical model developed in this study, the effect of FFAs supplied from different TPPs onto RA (%) is an important issue. Because FFA quantity causes to increase RA (%) with respect to the composed mathematical model. The FFA-based GPBMs, which have a compressive strength of more than 30 MPa, have higher radiation absorption (>12%) than ordinary Portland cement-based conventional building materials (9.52%). The highest compressive strength and RA percentage were measured as 93.3 MPa and 12.54%, respectively, for the GPBMs that are (properly) suited for the construction sector.

Research on Application of New Energy-Saving Building Materials

2012 ◽  
Vol 193-194 ◽  
pp. 406-410 ◽  
Author(s):  
Ai Fang Liu ◽  
Shu Rong Guo
Keyword(s):  
Energy Saving ◽  
Building Material ◽  
Building Materials ◽  
Development Trend ◽  
Scientific Data ◽  
Wall Material ◽  
Insulation Material ◽  
Essential Question ◽  
New Energy ◽  
Research On Application

Currently, energy saving and consumption reduction has been a crucial task the domestic people are facing with. It has been considered as essential question in the field of building materials to research and develop a new energy saving building material. In this paper, we classified new wall material and thermal insulation material, analyzed the performance, feature and application of such materials, selected typical foam concrete and slurry insulation material and analyzed their thermal properties and technology parameters and so on, to present the development trend and direction of energy saving building material, to provide valid scientific data to relevant building energy saving management units, design units and construction units, to play a positive guiding role in improving the application level of new energy saving building material and promoting new energy saving building material of high quality.

Design of Flowable Fill: Waste Foundry Sand as a Fine Aggregate

1996 ◽  
Vol 1546 (1) ◽  
pp. 70-78 ◽  
Author(s):  
S. T. Bhat ◽  
C. W. Lovell
Keyword(s):  
Compressive Strength ◽  
Flow Behavior ◽  
Penetration Resistance ◽  
Waste Material ◽  
Sand Fly ◽  
Toxicity Tests ◽  
Fine Aggregate ◽  
Foundry Sand ◽  
Flowable Fill ◽  
Waste Foundry Sand

Flowable fill is generally a mixture of sand, fly ash, a small amount of cement, and water. Sand is the major component of most flowable fill mixes; consequently, using a waste material as a substitute for natural sand results in the beneficial use of the waste material. Waste foundry sand (WFS) was used as a fine aggregate in this study. Three green sands from ferrous foundries and two Class F fly ashes were used. A natural river sand was used for comparison. The flow behavior, hardening characteristics, and ultimate strength behavior of flowable fill were investigated. The penetration resistance necessary to sustain walkability as the fresh flowable fill hardens was determined, and the time necessary to achieve this penetration resistance was defined as “walkable time.” The unconfined compressive strength at 28 days appeared to correlate well with the water-to-cement ratio. The 90-day compressive strength test results indicate that a maximum rise of 25 to 30 percent in long-term strength with respect to 28-day strength can be expected. The permeability of hardened flowable fill was found to be low (around 10−6cm/sec). The pH of pore solution of hardened flowable fill indicated that the potential for corrosivity is low. The toxicity tests indicated that some WFSs are environmentally safe. The concepts explained are not necessarily restricted to flowable fill containing WFS; they can be generalized as being applicable to all flowable fills.

scholarly journals Comparison of Conventional Concrete and Replacement of River Sand by Waste Foundry Sand and Cement by Nano-Silica

2020 ◽  
pp. 201-205
Keyword(s):  
Experimental Investigation ◽  
Compressive Strength ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Nano Silica ◽  
River Sand ◽  
Conventional Concrete ◽  
Foundry Sand ◽  
Concrete Production ◽  
Waste Foundry Sand

This paper presents an experimental investigation on the properties of concrete in which like cement is partially replacing by used nano silica and is partially replacing by used waste foundry sand. Because now a day the world wide consumption of sand as cement and as fine aggregate in concrete production is very high. Nano silica and waste foundry sand are major by product of casting industry and create land pollution. The cement will be replaced with nano silica and the river sand will be replaced with waste foundry sand (0%, 5%, 10%, 15%, 20%). This experimental investigation was done and found out that with the increase in the nano silica and waste foundry sand ratio. Compression test has been done to find out the compressive strength of concrete at the age of 7, 14, 21, and 28. Test result indicates in increasing compressive strength of plain concrete by inclusion of nano silica as a partial replacement of cement and waste foundry sand as a partial replacement of fine aggregate.

scholarly journals Physical and Mechanical Properties of Cemented Ash-Based Lightweight Building Materials with and without Pumice

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Neslihan Doğan-Sağlamtimur ◽  
Adnan Güven ◽  
Ahmet Bilgil
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Building Material ◽  
Building Materials ◽  
Physical And Mechanical Properties ◽  
Mixing Ratio ◽  
Lightweight Material ◽  
Important Input ◽  
Axial Compressive Strength ◽  
International Companies

Pumice, cements (CEM I- and CEM II-type), waste fly and bottom ashes (IFA, GBA, and BBA) supplied from international companies were used to produce lightweight building materials, and physical-mechanical properties of these materials were determined. Axial compressive strength (ACS) values were found above the standards of 4 and 8 MPa (Bims Concrete (BC) 40 and 80 kgf/cm2 class) for cemented (CEM I) pumice-based samples. On the contrary, the ACS values of the pumice-based cemented (CEM II) samples could not be reached to these standards. Best ACS results (compatible with BC80) from these cemented lightweight material samples produced with the ashes were found in 50% mixing ratio as 10.6, 13.2, and 20.5 MPa for BBA + CEM I, GBA + CEM II, and IFA + CEM I, respectively, and produced with pumice were found as 8.4 MPa (same value) for GBA + pumice + CEM II (in 25% mixing ratio), BBA + pumice + CEM I (in 100% mixing ratio), and pumice + IFA + CEM I (in 100% mixing ratio), respectively. According to the results, cemented ash-based lightweight building material produced with and without pumice could widely be used for constructive purposes. As a result of this study, an important input to the ecosystem has been provided using waste ashes, whose storage constitutes a problem.

scholarly journals Recovery of Silicon Dioxide from Waste Foundry Sand and Alkaline Activation of Desilicated Foundry Sand

2020 ◽  
Vol 6 (4) ◽  
pp. 700-714
Author(s):  
Tebogo Mashifana ◽  
Thandiwe Sithole
Keyword(s):  
Potassium Hydroxide ◽  
Solution Concentration ◽  
Curing Temperature ◽  
Strength Development ◽  
Waste Generation ◽  
Optimum Conditions ◽  
Foundry Sand ◽  
Solid Ratio ◽  
Waste Foundry Sand ◽  
Alkaline Activator

Abstract This study was conducted to recover silica (desilication) as a valuable metalloid from waste foundry sand (WFS) by a leaching process and to find application for desilicated foundry sand (DFS). The leaching time applied was 5 h; 3 M of potassium hydroxide (KOH) was used as a leaching reagent. The agitation speed of 200 rpm and the liquid/solid ratio of 25 were found to be the best conditions for optimum leaching results. A geopolymer from DFS was developed by using NaOH as an alkaline activator. The results obtained showed that the optimum conditions for the synthesis of a geopolymer were 15 M NaOH, 150 µm DFS particle size, and a curing temperature of 80 ℃ for 72 h. The geopolymer strength development was due to the formation of Phillipsite and Kalsilite as new hydration products. At the optimum alkaline solution concentration, the highest unconfined compressive strength (UCS) of 4.8 MPa was achieved. The developed geopolymer met the minimum strength requirements for load bearing material. This study provides an innovative and novel solution for the beneficiation of spent foundry sand and the recovery of a valuable metalloid, resulting to zero waste generation. Graphical Abstract

Surface electrical resistivity and compressive strength of concrete with the use of waste foundry sand as aggregate

2019 ◽  
Vol 212 ◽  
pp. 514-521 ◽  
Author(s):  
Gustavo J.L. Coppio ◽  
Maryangela Geimba de Lima ◽  
Julia W. Lencioni ◽  
Luciana S. Cividanes ◽  
Paulo P.O.L. Dyer ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Electrical Resistivity ◽  
Foundry Sand ◽  
Waste Foundry Sand ◽  
Compressive Strength Of Concrete

scholarly journals Crossover Effect in Cement-Based Materials: A Review

2019 ◽  
Vol 9 (14) ◽  
pp. 2776 ◽  
Author(s):  
Sumra Yousuf ◽  
Payam Shafigh ◽  
Zainah Ibrahim ◽  
Huzaifa Hashim ◽  
Mohammad Panjehpour
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Building Materials ◽  
Cement Hydration ◽  
Curing Temperature ◽  
Future Research ◽  
Hydration Products ◽  
Crossover Effect ◽  
Cement Based Materials ◽  
Mineral Compositions

Cement-based materials (CBMs) such as pastes, mortars and concretes are the most frequently used building materials in the present construction industry. Cement hydration, along with the resulting compressive strength in these materials, is dependent on curing temperature, methods and duration. A concrete subjected to an initial higher curing temperature undergoes accelerated hydration by resulting in non-uniform scattering of the hydration products and consequently creating a great porosity at later ages. This phenomenon is called crossover effect (COE). The COE may occur even at early ages between seven to 10 days for Portland cements with various mineral compositions. Compressive strength and other mechanical properties are important for the long life of concrete structures, so any reduction in these properties is of great concern to engineers. This study aims to review existing information on COE phenomenon in CBMs and provide recommendations for future research.

scholarly journals PEMANFAATAN LIMBAH GENTENG BETON PADA PAVING BLOCK

2019 ◽  
Vol 1 (1) ◽  
pp. 36-45
Author(s):  
Pratikto Pratikto ◽  
Ginanjar A
Keyword(s):  
Compressive Strength ◽  
Building Material ◽  
Surface Hardening ◽  
Building Materials ◽  
Coarse Aggregate ◽  
Road Surface ◽  
High Rise ◽  
Waste Concrete ◽  
Constituent Material

Paving block merupakan bahan bangunan yang digunakan sebagai pekerasan permukaan jalan, baik jalan untuk keperluan parkir kendaraan ataupun jalan raya, ataupun untuk keperluan dekoratif pada pembuatan taman. Bahan penyusun paving block adalah semen, pasir dan air dengan atau tanpa bahan tambah lainnya. Bahan tambah yang digunakan dapat berupa limbah atau sisa bahan bangunan yang tidak terpakai. Penggunaan limbah bertujuan untuk mendapatkan mutu paving block sesuai standard dan memanfaatkan limbah secara optimal. Limbah genteng beton banyak ditemukan di sekitar bangunan bertingkat yang sudah lama dan khususnya kampus Politeknik Negeri Jakarta.Limbah ini dapat digunakan sebagai bahan pembentuk paving block sebagai substitusi agregat kasar. Dalam penelitian ini digunakan perbandingan semen dan pasir adalah 1 : 3 dengan presentase limbah genteng beton sebesar 0%, 10%, 20%, 30%, dan 40%. Nilai fas yang digunakan adalah 0,35. Hasil pengujian nilai kuat tekan yang ditinjau pada hari ke 7 pada presentase 0% sebesar 52,59 Mpa, presentase 10% sebesar 44,949 Mpa, presentase 20% sebesar 40,942 Mpa, presentase 30% sebesar 40,685 Mpa dikategorikan mutu A, sedangkan presentase 40% sebesar 26 MPa dikategorikan mutu B.Kata kunci: paving block, Limbah genteng beton, agregat kasar Paving block is a material that is used as a road surface hardening, either for vehicle parking , highways, or for decorative purposes in gardening. The constituent material of paving blocks are cement, sand and water with or without other added material. The added material used can be in the form of waste or residual unused building materials. The use of waste building material of concrete tile aims to get the quality of paving blocks according to standards and utilize waste optimally. Waste concrete roof tiles can be found around many high-rise building constructions and especially Jakarta State Polytechnic campus.This waste can be used as a paving block as a rough aggregate substitute. In this study the ratio of cement and sand was 1: 3 with a percentage of concrete tile waste of 0%, 10%, 20%, 30%, and 40%. The fas value used is 0.35. The testing results of compressive strength which is reviewed on day 7 at a percentage of 0% of 52.59 MPa, 10% of 44.949 MPa, 20% of 40.942 MPa, 30% of 40.658 MPa are categorized as grade A, while at a percentage of 40% the compressive strength is 26 MPa which is categorized as grade B.Keywords: paving block , waste concrete tile, coarse aggregate

Effect of Calcium Hydroxide and Water to Solid Ratio on Compressive Strength of Mordenite-Based Geopolymer and the Evaluation of its Thermal Transmission Property

2018 ◽  
Author(s):  
Mauricio H. Cornejo ◽  
Jan Elsen ◽  
Bolivar Togra ◽  
Haci Baykara ◽  
Guillermo Soriano ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Experimental Design ◽  
Calcium Hydroxide ◽  
Building Material ◽  
Building Materials ◽  
Raw Material ◽  
Scanning Calorimetry ◽  
Solid Ratio ◽  
Central Composite Experimental Design

Mordenite-rich tuff is one of most available zeolitic rocks all over the world. Because of this, the research of natural mordenite as a raw material of geopolymeric materials can provide an almost unlimited source of solid precursor for manufacturing such building materials. Despite efforts to shed light on the behaviour of mordenite-rich tuff during geopolymeric reaction, the performance of these novel materials is barely understood. The aim of this study is to explore the effect of the content of calcium hydroxide, CH, and water-to-solid ratio, W/S, as mixing parameters on compressive strength of mordenite-based geopolymers, MBG, and its thermal conductivity. As solid precursor was used mordenite-rich tuff and mixed with sodium hydroxide (NaOH) at 10M that kept constant during the experiment. Two experimental parameters were selected as independent variables i.e, the content of CH and water-to-solid ratio, and their levels, according to a central composite experimental design. All these designed mixes were characterized by using quantitative X-ray diffraction (QXRD), Fourier Transform Infrared spectroscopy (FTIR), Thermogravimetry and differential scanning calorimetry (TGA-DSC), scanning electron microscopy coupled with energy dispersed spectroscopy (SEM-EDS), in addition thermal conductivity tests were also run according to standard method ASTM C177 at 9, 24, 39°C. The overall results suggested that MBG can be used as building material, however its thermal conductivity was higher than that of commercial isolate building material. The experimental design analysis indicated that the optimum water-to-solid ratio was 0.35, but in the case of the content of CH, the optimum value was not observed on this experimental range because the compressive strength increased as the content of CH increased as well. The compressive strength of MBG was observed in the range between 8.7 and 11.3 MPa. On the other hand, QXRD and FTIR showed that mordenite reacted during the geopolymeric reaction, but instead quartz, also found in zeolitic tuff, acted as inert filler.

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