Investigation on Properties of Cellular Lightweight Concrete Blocks With Bottom Ash

2019 ◽  
Author(s):  
Heraji Hansika ◽  
Anura Nanayakkara
Keyword(s):  
Lightweight Concrete ◽  
Bottom Ash ◽  
Concrete Blocks

scholarly journals Thermal Inertia Characterization of Multilayer Lightweight Walls: Numerical Analysis and Experimental Validation

2021 ◽  
Vol 11 (11) ◽  
pp. 5008
Author(s):  
Juan José del Coz-Díaz ◽  
Felipe Pedro Álvarez-Rabanal ◽  
Mar Alonso-Martínez ◽  
Juan Enrique Martínez-Martínez
Keyword(s):  
Lightweight Concrete ◽  
Thermal Flux ◽  
Experimental Studies ◽  
Thermal Inertia ◽  
Transient State ◽  
Experimental Tests ◽  
Building Design ◽  
Experimental Methodology ◽  
Improve Energy Efficiency ◽  
Concrete Blocks

The thermal inertia properties of construction elements have gained a great deal of importance in building design over the last few years. Many investigations have shown that this is the key factor to improve energy efficiency and obtain optimal comfort conditions in buildings. However, experimental tests are expensive and time consuming and the development of new products requires shorter analysis times. In this sense, the goal of this research is to analyze the thermal behavior of a wall made up of lightweight concrete blocks covered with layers of insulating materials in steady- and transient-state conditions. For this, numerical and experimental studies were done, taking outdoor temperature and relative humidity as a function of time into account. Furthermore, multi-criteria optimization based on the design of the experimental methodology is used to minimize errors in thermal material properties and to understand the main parameters that influence the numerical simulation of thermal inertia. Numerical Finite Element Models (FEM) will take conduction, convection and radiation phenomena in the recesses of lightweight concrete blocks into account, as well as the film conditions established in the UNE-EN ISO 6946 standard. Finally, the numerical ISO-13786 standard and the experimental results are compared in terms of wall thermal transmittance, thermal flux, and temperature evolution, as well as the dynamic thermal inertia parameters, showing a good agreement in some cases, allowing builders, architects, and engineers to develop new construction elements in a short time with the new proposed methodology.

scholarly journals MINERALOGY AND ORGANIC MATTER CONTENT OF BOTTOM ASH SAMPLES FROM AGIOS DIMITRIOS POWER PLANT, GREECE

2004 ◽  
Vol 36 (1) ◽  
pp. 320 ◽  
Author(s):  
N. Kantiranis ◽  
Α. Georgakopoulos ◽  
A. Fiiippidis ◽  
A. Drakoulis
Keyword(s):  
Organic Matter ◽  
Power Plant ◽  
Lightweight Concrete ◽  
Inorganic Compounds ◽  
Amorphous Material ◽  
Bottom Ash ◽  
Organic Matter Content ◽  
Mineralogical Composition ◽  
Matter Content ◽  
Loss On Ignition

Four bottom ash samples from the Power Units of the Agios Dimitrios Power Plant were studied by the method of PXRD to determine their semi-quantitative mineralogical composition. Their organic matter content was calculated by a wet chemical process. Also, the loss on ignition was measured. The samples are constituted mainly of calcite, quartz and feldspars, while micas, clays, gehlenite and portlandite were determined in a few samples in smaller quantities. The amorphous material varied between 10-43 wt. %, while organic matter varied between 5-42 wt. %. Measurements of the loss on ignition overestimate the unburned lignite contents in the bottom ash samples. The management of bottom ashes with high contents of unburned lignite should differ to that of the fly ashes. The oxidation of the inorganic compounds of the unburned lignite may lead to environmental degradation of the landfill areas. Samples showing lower values of organic matter are suitable for a series of uses, such as: snow and ice control, as an aggregate in lightweight concrete masonry units,as a raw feed material for portland cement, as an aggregate in cold mix emulsified asphalt mixes, base or sub-base courses, or in shoulder construction. Systematic study of the unburned lignite of bottom ashes is needed for possible re-combustion.

scholarly journals Growth rate of Acropora formosa coral fragments transplanted on different composition of faba kerbstone artificial reef

2019 ◽  
Vol 20 (12) ◽  
Author(s):  
Ruly Isfatul khasanah ◽  
ENDANG YULI HERAWATI ◽  
ANIK MARTINAH HARIATI ◽  
MOHAMMAD MAHMUDI ◽  
AIDA SARTIMBUL ◽  
...  
Keyword(s):  
Growth Rate ◽  
Waste Product ◽  
Bottom Ash ◽  
Artificial Reef ◽  
Raw Material ◽  
Live Coral ◽  
Colony Diameter ◽  
Significant Difference ◽  
Concrete Blocks ◽  
Acropora Formosa

Abstract. Khasanah RI, Herawati EY, Hariati AM, Mahmudi M, Sartimbul A, Wiadnya DGR, Asrial E, Yudatomo, Nabil R. 2019. Growth rate of Acropora formosa coral fragments transplanted on different compositions of faba kerbstone artificial reef. Biodiversitas 20: 3593-3598. A counter measure and an alternative technique to reduce coral reef destruction is through transplantation, which requires the relocation or cutting of a live coral, planted in a designated place containing damaged varieties. Faba kerbstone is a product innovation similar to paving block/brick, made from fly and bottom ash (FABA), which is the dominant waste product from PT Jawa Power, Probolinggo, Indonesia. In addition, it has also been widely utilized as a raw material in the creation of paving and concrete blocks, composed by harmless material, with a length, width, and height of 40, 25 and 15 cm, respectively. This study aims to observe the growth rate of Acropora formosa coral fragments transplanted on a faba kerbstone, using five different fly and bottom ash compositions: K1 = 0% Fa, K2 = 25% Fa and 75% Ba, K3 = 50% FA and 50% Ba, K4 = 75% Fa and 25% Ba, while K5 = 100% Fa and 0% Ba. Furthermore, the observations were conducted underwater, using scuba diving for six months, observing the parameters of fragment length, colony diameter, and branches number. In addition, the highest elongation rate of A. formosa coral fragments was identified at K2 (1.313 ± 0.447 cm/month), and K1 (1.185 ± 0.642 cm/month), while the most significant increment in colony diameter was observed in K2 (0.077 ± 0.060 cm/month) and K1 (0.063 ± 0.071 cm/month), and the largest number of branches was also found in K2 (29.50 or 4.28 branches/month) and K1 (25.25 or 3.67 branches/month). Furthermore, the one-way ANOVA and Tukey's HSD test (p = 0.05) showed was no significant difference in the fragments elongation and colony diameters in the K1 and K2 models, although there was substantial variation from the K3, K4, and K5.

The Comparative Analysis of External Walls in a Passive House with Respect to Environment and Energy

2013 ◽  
Vol 649 ◽  
pp. 258-261 ◽  
Author(s):  
Silvia Baďurová ◽  
Radoslav Ponechal
Keyword(s):  
Ecological Footprint ◽  
Energy Savings ◽  
Lightweight Concrete ◽  
Passive House ◽  
Timber Frame ◽  
Voluntary Standards ◽  
Construction Techniques ◽  
Timber Constructions ◽  
Concrete Blocks

The term "passive house" refers to rigorous and voluntary standards for energy efficiency in a building, reducing its ecological footprint. There are many ways how to build a passive house successfully. These designs as well as construction techniques vary from ordinary timber constructions using packs of straw or constructions of clay. This paper aims to quantify environmental quality of external walls in a passive house, which are made of a timber frame, lightweight concrete blocks and sand-lime bricks in order to determine whether this constructional form provides improved environmental performance. Furthermore, this paper assesses potential benefit of energy savings at heating of houses in which their external walls are made of these three material alternatives. A two-storey residential passive house, with floorage of 170.6 m2, was evaluated. Some measurements of air and surface temperatures were done as a calibration etalon for a method of simulation.

scholarly journals SUSTAINABLE UTILIZATION OF DISCARDED FOUNDRY SAND AND CRUSHED BRICK MASONRY AGGREGATE IN THE PRODUCTION OF LIGHTWEIGHT CONCRETE

2017 ◽  
Vol 9 (1) ◽  
pp. 52-61 ◽  
Author(s):  
Gireesh MAILAR ◽  
Sujay Raghavendra N. ◽  
Parameshwar HIREMATH ◽  
Sreedhara B. M. ◽  
Manu D. S.
Keyword(s):  
Lightweight Concrete ◽  
Brick Masonry ◽  
Experimental Program ◽  
Fine Aggregate ◽  
River Sand ◽  
Foundry Sand ◽  
Durability Properties ◽  
Substitution Level ◽  
Concrete Blocks ◽  
Crushed Brick

Nowadays, there is a considerable shortage in the availability of river sand and natural stone aggregate for the construction activities all around the globe and the way out is being worked out by the use of discarded foundry sand and crushed brick masonry aggregate for construction purposes. In the present study, river sand was partly replaced by the discarded foundry sand procured from steel moulding industries and the crushed brick masonry aggregate was used as coarse aggregate for the production of lightweight concrete. The experimental program involved casting of six distinct mixes with 0%, 20%, 40%, 60%, 80% & 100% replacement of fine aggregate by discarded foundry sand. The mechanical and durability properties of the lightweight concrete were assessed for each of the six diverse blends. Even though the 80% and 100% replacement mixes were found to be less dense than the rest of the mix, the blend of 40% replacement acquired desirable mechanical and durability properties when compared to that of all other mixes. The optimum replacement level of the discarded foundry sand by mass to the river sand was 40%. The lightweight concrete produced by utilizing crushed brick masonry aggregate and discarded foundry sand (40% substitution level) can be employed in all major structural lightweight construction aspects and is ideally suited for sloped roof slabs and making architectural or decorative concrete blocks.

scholarly journals Mechanical and Durability Characteristics of Rainwater Penetration and Retention Pavement Concrete Blocks Incorporating Bottom Ash Aggregates

2020 ◽  
Vol 20 (5) ◽  
pp. 195-205
Author(s):  
Hwang-Hee Kim ◽  
Ri-On Oh ◽  
Jae-Young Lee ◽  
Sung-Ki Park ◽  
Sang-Sun Cha ◽  
...  
Keyword(s):  
Bottom Ash ◽  
Experimental Tests ◽  
Fine Aggregate ◽  
Replacement Ratio ◽  
Slip Resistance ◽  
Concrete Blocks ◽  
Target Performance ◽  
Design And Manufacture ◽  
Ash Aggregates ◽  
Pavement Concrete

In this study, the mechanical properties and durability of rainwater penetration and retention pavement concrete blocks incorporating bottom ash fine aggregate were investigated to develop pavement concrete blocks that could reduce the rainwater leakage of impervious concrete structures. Pavement concrete blocks were prepared by replacing 0%, 10%, and 20% of the weight of natural fine aggregate with bottom ash fine aggregate for 410 and 450 kg/m<sup>3</sup> cement contents. Experimental tests were conducted to determine the compressive strength, flexural strength, abrasion resistance, slip resistance, freeze–thaw resistance, and permeability coefficient of the pavement concrete blocks. Pavement concrete blocks produced with a cement content of 450 kg/m<sup>3</sup> and a 10% replacement ratio of bottom ash fine aggregate satisfied the target performance and exhibited the best overall performance. Theseoptimal mix parameters were applied in this study to design and manufacture pavement concrete blocks for rainwater penetration and retention that satisfied the target performance.

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