Pore Structure and Thermal Characteristics of Clay Bricks

2014 ◽  
Vol 982 ◽  
pp. 104-107 ◽  
Author(s):  
Monika Čáchová ◽  
Dana Koňáková ◽  
Eva Vejmelková ◽  
Martin Keppert ◽  
Kirill Polozhiy ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Structural Material ◽  
Physical Properties ◽  
Thermal Characteristics ◽  
Clay Brick ◽  
Pore System ◽  
Clay Bricks ◽  
Vacuum Saturation ◽  
The Difference ◽  
System Characteristics

Clay brick was perhaps to be the first artificial structural material. First bricks were dried by sun; later people had started to burn bricks by fire and in that time further enhancements appeared. This article deals with two kinds of fired clay bricks; basic physical properties, pore system characteristics and thermal properties are studied. The values of basic physical properties by water vacuum saturation vary slightly; bulk density shows values around 1880 kg/m3 and in the case of open porosity it is around 27%. Regarding thermal properties the difference is higher, obtained results of thermal conductivities in dried state vary by about 33%.

Influence of Moisture Content on the Thermal Properties of Concrete Containing Agricultural Waste Materials

2016 ◽  
Vol 677 ◽  
pp. 241-245
Author(s):  
Dana Koňáková ◽  
Monika Čáchová ◽  
Eva Vejmelková
Keyword(s):  
Thermal Properties ◽  
Moisture Content ◽  
Physical Properties ◽  
Agricultural Waste ◽  
Thermal Characteristics ◽  
Waste Materials ◽  
Experimental Measurements ◽  
Transport Parameters ◽  
Cement Replacement ◽  
Coir Pith

This article deals with concrete containing waste material originating in a coir fibres extraction from outer protective peel of a coconut. Coir pith is used as cement replacement in amount of 5% and 10%. The influence of moisture content on the thermal properties of studied concrete is determined by means of experimental measurements of basic physical properties, hygric transport parameters and thermal characteristics. From achieved results it can be concluded, that the higher amount of coir pith is used, the better values of thermal characteristics material show. But at the same time thermal characteristics are more influenced by moisture content.

scholarly journals Thermal conductivity of clay based material incorporating Argan Shell: Experimental characterization

2021 ◽  
Vol 229 ◽  
pp. 01032
Author(s):  
Aicha Idoum ◽  
Lahcen Bammou ◽  
Rachid Tiskatine ◽  
Ahmed Aharoune
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
Bulk Density ◽  
The Other ◽  
Firing Process ◽  
Experimental Characterization ◽  
Clay Brick ◽  
Clay Bricks ◽  
Materials Used ◽  
The Impact

This research investigated the impact of agricultural biomass additives (Argan shell) on the thermal and physical properties of fired clay bricks for building application. The objective of the study is to characterize the selected materials from molecule up to the final materials used in buildings. The materials used in this study, are soil and Argan shells, locally available materials for brick making. The Argan shells were grinded and then added to the clay mixture. The Clay brick shows a formation of pores during the firing process up to 1050°C. As results, the bulk density of the clay bricks decreased due to the pores formation. On the other hand, the thermal conductivity of the clay bricks was reduced by 53% using 20wt% of the biomass additives.

scholarly journals Effect of the change of firing temperature on microstructure and physical properties of clay bricks from Beruas (Malaysia)

2010 ◽  
Vol 42 (2) ◽  
pp. 245-254 ◽  
Author(s):  
I. Johari ◽  
S. Said ◽  
B. Hisham ◽  
A. Bakar ◽  
Z.A. Ahmad
Keyword(s):  
Physical Properties ◽  
Firing Temperature ◽  
Phase Changes ◽  
Test Results ◽  
Clay Brick ◽  
Soaking Time ◽  
Clay Bricks ◽  
Optimum Firing ◽  
Optimum Firing Temperature

This study is focused on the behaviour of fired-clay brick from the area around Beruas (Malaysia) that is known for it brick industries. The firing temperatures were set from 800?C to 1250?C and soaking time was fixed for an hour. The effects of firing temperature on the phase changes, microstructure, compressive strength, water absorption and porosity of the bricks were investigated. Test results indicate that the optimum firing temperature was found to be 1200?C. The percentage of porosity significantly reduces from 39.33% to 5.87% when sintered from 1000?C to 1250?C. Bricks sintered at 1200?C exhibited the highest strength of 89.5 N/mm2. The effect of firing temperature significantly improved the microstructure in terms of porosity and the quality of physical properties of fired-clay bricks.

Thermal Conductivity of Fired Clay Bricks Incorporated with Cigarette Butts

2013 ◽  
Vol 690-693 ◽  
pp. 919-924 ◽  
Author(s):  
Noor Amira Sarani ◽  
Aeslina binti Abdul Kadir
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Environmental Pollution ◽  
Clay Brick ◽  
Heating Rates ◽  
Plate Method ◽  
Clay Bricks ◽  
Cigarette Butts ◽  
Cigarette Butt ◽  
Public Areas

Billions of cigarette butts (CBs) were discarded by smokers directly into the environment. It is known that CBs are one of the environmental pollution that could caused contamination on the street, sidewalks, waterways, beaches and public areas. Due to its small size but large in volume, CBs cannot be collected easily and most of it will be disposed directly to the landfill. Moreover, there is no easy mechanism to ensure the separation of the chemicals trap inside the CBs which is toxic to the environment. Therefore, by incorporating CBs into brick bodies will be an alternative solution to CBs littering and pollution problems. In this study, different percentages of CBs (0%, 2.5% and 5.0%) were incorporated into fired clay brick. Different heating rates were applied during firing stage which are 1oC/min, 3oC/min and 5oC/min respectively. All samples were fired at 1050oC. Thermal conductivity for cigarette butt brick (CB Brick) were tested using Hot Guarded Plate Method. From the results obtained, it could be concluded that; with higher percentages of CBs, the thermal conductivity properties were also improved which is desired but most of the brick manufacturers. CBs incorporated could be an alternative pore formers to improve the thermal properties of fired clay brick. At the same time, the porosity is also increased thus the density was significantly reduced to become lightweight brick.

A Consideration on the Behavior of Hydraulic Pressure Ripples in Relation to Hydraulic Oil Temperature

2015 ◽  
Author(s):  
Shuichi Nakagawa ◽  
Takayoshi Ichiyanagi ◽  
Takao Nishiumi
Keyword(s):  
Thermal Properties ◽  
Physical Properties ◽  
Mathematical Models ◽  
Bulk Modulus ◽  
Temperature Change ◽  
Speed Of Sound ◽  
Thermal Characteristics ◽  
Hydraulic Pressure ◽  
Hydraulic Oil ◽  
Pressure Ripples

It is well known that hydraulic noise can change as a system warms up. That change can be a factor for misperception of mechanical failure, because noise can play an important role as a signal that indicates abnormal operation. It is therefore important to understand the behavior of hydraulic pressure ripples that are a source of hydraulic noise in operating conditions, and how they change in relation to the temperature of the hydraulic oil. This study has investigated the ripple behavior that results from temperature change in simple hydraulic systems, using mathematical models that took thermal properties into account. Physical properties of the oil and the speed of sound in the oil have been defined as temperature-related variables in the mathematical models. The physical properties that should be used in the mathematical models have been obtained directly from the oil manufacturer. In contrast, the speed of sound in the oil has to be obtained from the isentropic tangent bulk modulus of the oil in an actual operating condition. That has been determined from the specific volume ratio of entrained air to the oil and the isentropic tangent bulk modulus of the only oil. The thermal properties of the speed of sound in the oil have been determined from the thermal characteristics of these variables, and it has been found that the speed of sound in the oil decreases with a rise in the oil temperature. The mathematical models of pressure ripples have shown that there were three distinct phenomena resulting from the temperature change of the oil. The first is the change of wavelength. The second is the spatial dependence of the thermal characteristics of the pressure ripples. The third is the difference of the thermal characteristics of the pressure amplitude at the peak in spatial modes. These changes that result from the temperature variation tend to be large at higher frequency.

scholarly journals Thermal characterization of a new effective building material based on clay and olive waste

2018 ◽  
Vol 149 ◽  
pp. 02053 ◽  
Author(s):  
Lamrani Mohamed ◽  
Khalfaoui Mohamed ◽  
Laaroussi Najma ◽  
Khabbazi Abdelhamid
Keyword(s):  
Thermal Properties ◽  
Thermophysical Properties ◽  
Building Material ◽  
Volume Fraction ◽  
Raw Materials ◽  
Thermal Characteristics ◽  
Thermal Characterization ◽  
Energy Performance ◽  
Clay Bricks ◽  
Mass Fractions

The influence of thermophysical properties of wall materials on energy performance and comfort in traditional building was investigated. The clay is the most commonly used sustainable building material. The study looked at the effects of the addition of pomace olive on the thermophysical properties of clay bricks to improve the energy efficiency of this ecological material. An experimental measurement of thermal properties of clay mixed with pomace olive was carried out by using the transient and steady state hot-plate and flash methods. The experimental methods are applied to measure the thermal properties of the composite material. The estimation of these thermal characteristics is based on a one dimensional model and the experimental errors are found less than 3%. The composite samples were prepared with different granular classes and mass fractions of the pomace olive in the mixture. The results show that the density of the new material was not substantially influenced by the size of the pomace olive. However, the thermal conductivity and diffusivity decrease from 0.65 W.m-1.K-1 and 4.21×10-7 m2.s-1 to 0.29 W.m-1.K-1 and 2.47×10-7m2.s-1, respectively, according to the variation of the volume fraction of pomace olive from 0 (pure clay) to 71% showing that the olive pomace can be used as effective secondary raw materials in the making of clay bricks.

Effect of Rice Husk and Rice Husk Ash on Properties of Lightweight Clay Bricks

2015 ◽  
Vol 659 ◽  
pp. 74-79 ◽  
Author(s):  
Sutas Janbuala ◽  
Thanakorn Wasanapiarnpong
Keyword(s):  
Compressive Strength ◽  
Organic Matter ◽  
Chemical Composition ◽  
Water Absorption ◽  
Bulk Density ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Clay Brick ◽  
Clay Bricks ◽  
The Difference

The objective of this study is to investigate the effect of rice husk and rice husk ash which have the difference chemical composition and organic matter on porosity and properties of lightweight clay brick . Comparative adding between rice husk and rice husk ash were varied by 10, 20, 30, 40 % by weight. The results showed that more adding of rice husk and rice husk ash increase pore in microstructure and water absorption, while decrease bulk density. Porosity and water absorption are maximized when the rice husk are added at 40 %. The clay brick with 10, 20 and 30 % of rice husk or rice husk ash addition showed the required density and compressive strength followed the industrial standard of lightweight brick. The addition with 10 % of rice husk showed the best properties as 1.20 g/cm3 of bulk density and 4.6 MPa of compressive strength with 36.57 % of porosity. Whereas, the 10 % addition of rice husk ash showed 1.18 g/cm3 of bulk density and 5.97 MPa with 37.27 % of porosity.

Effect of Crushed Clay Brick as Coarse Aggregate on Creep Behavior of Concrete

2011 ◽  
Vol 261-263 ◽  
pp. 178-181 ◽  
Author(s):  
Ahmad Syed Ishtiaq ◽  
Roy Sushanta
Keyword(s):  
Creep Strain ◽  
Loading Condition ◽  
Coarse Aggregate ◽  
Concrete Strength ◽  
Creep Testing ◽  
Mix Design ◽  
Clay Brick ◽  
Clay Bricks ◽  
The Difference ◽  
Representative Samples

Difference between creep behaviors of concrete made from stone chips and crushed clay bricks, i.e. brick chips as coarse aggregate are examined by means of creep testing on their representative samples. Two different grades of concrete 17.2 and 27.5 N/mm2 are prepared from brick chips and stone chips using appropriate mix design and are tested for creep for up to 50 days. Stone chips and brick chips aggregates used are selected in a way so that their gradation and fineness modulus remains as close as possible. Results from creep testing shows that concrete made from brick chips as coarse aggregate having same strength as that of concrete made from stone chips shows higher creep strain. As concrete strength increases, the difference in creep strain becomes more pronounced. Also, at initial loading condition, concrete made from brick chips shows higher rate of creep strain than that of concrete made from stone chips.

THERMAL CONDUCTIVITY, COMPRESSIVE STRENGTH AND WATER ABSORPTION OF RECYCLED COCONUT FIBRE AND CRUSHED CLAY BRICK MASONRY

2015 ◽  
Vol 76 (11) ◽  
Author(s):  
Renga Rao Krishnamoorth ◽  
Thevaneyan Krista David
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Thermal Properties ◽  
Water Absorption ◽  
Green Building ◽  
Clay Brick ◽  
Coconut Fiber ◽  
Commercial Development ◽  
Line Heat Source ◽  
Clay Bricks

This study aims to investigate the thermal conductivity, compressive strength and water absorption analysis of recycled masonry bricks using coconut fiber and crushed clay bricks as a partial sand replacement to create a green building material. The variable ratios of coconut fiber were considered and 10 specimens per sample were manufactured manual process using hand. Four (4) series of brick mix design from the total weight of the sand with different levels of coconut fiber and crushed clay brick replace half of the sand was created as irregular mixes comprises of 0%, 2%, 4% and 6% of coconut fiber. Overall, the use of coconut fiber and crushed clay brick as a partial sand replacement reduce the brick thermal conductivity. Thermal properties were measured based on the transient line heat source method using a KD2 Pro thermal properties analyzer. The suitable percentage of partial sand replacement for sand-cement brick using coconut fiber in this study was 4% and 50% of crushed clay brick after compared to commercial brick. The average sample of 4% coconut fiber was 0.532 W/mk of thermal conductivity and 18.74MPa compressive strength with density of 1716.28 kg/m3. In short, the thermal insulation potential of coconut fiber and crushed clay brick is highly promising for commercial development in Malaysia.

scholarly journals Enhancing physical-thermal-mechanical properties of fired clay bricks by eggshell as a bio-filler and flux

2019 ◽  
Vol 51 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Nuchnapa Tangboriboon ◽  
Sopita Moonsri ◽  
Atima Netthip ◽  
Watchara Sangwan ◽  
Anuvat Sirivat
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Water Absorption ◽  
Extrusion Process ◽  
Clay Brick ◽  
Clay Bricks ◽  
Low Thermal Expansion ◽  
Thermal Mechanical Properties

Fired clay bio-bricks were prepared by adding eggshell as a bio-filler and flux into earthenware clay compounds via an extrusion process. In this study, the suiTab. conditions for clay bricks preparation were firing at 1000?C for a period of 5 h. Adding 20 wt% eggshell powder into the clay brick yielded good physical-mechanical-thermal properties: high compressive strength and hardness, low thermal expansion coefficient, and low water absorption. The measured compressive strength, hardness, and refractory water absorption were 7.0 MPa, 6.0 HV, and less than 15 wt%, respectively. The obtained clay brick with the eggshell powder added as shown here is potential for uses as bricks for construction and thermal insulation.

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