Authors:Laith Sh. Rasheed, Laith Mohammed Ridha Mahmmod, Sara Alaa Abed Alameer, and Abdulrasool Thamer Abdulrasool
to produce concrete with sustainable curing technique in which the potential cracking would be substantially reduced. Graded Clay Brick Waste (CBW) was employed as internal curing agent as alternative martial with 10% and 15% volumetric percentage
, Bjarlov S. , Peuhkuri R. Moisture transport properties of brick -comparison of exposed, impregnated and rendered brick , International RILEM Conference on Materials, Systems and Structures in Civil Engineering
Authors:A. J. Parsons, S. D. J. Inglethorpe, D. J. Morgan, and A. C. Dunham
Using a system based on non-dispersive infrared (NDIR) detectors, evolved gas analysis (EGA) was able to identify and quantify the principal volatiles produced by heating powdered samples of UK brick clays. From these results, atmospheric emissions likely to result from brick production can be predicted. In addition, EGA results for extruded brick clay test pieces are significantly different from those of powdered samples. Within an extruded brick clay body, evolved gases are contained within a pore system and evolved gas-solid phase reactions also occur. This EGA study provides further evidence on the nature of firing reactions within brick clay bodies. The qualitative and quantitative influence of heating rate — a key process condition in brick manufacture — on gas release is also outlined.
, Bektas F. , Monteiro P. J. M.
Use of ground clay brick as a pozzolanic material to reduce the alkali-silica reaction , Cement & Concrete Research , Vol. 33 , No. 10 , 2003 , pp. 1539 – 1542
This paper examines the possibility of a correlation between orthodoxy and brick burials, also investigating burials with brick and stone. Among the peoples inhabiting the Carpathian Basin the custom of brick burials had no direct antecedent. Based on our research brick burials seem to have been taken over from the Balkan, while concerning burials with stone the former Upper Hungary played an important role as well. The tradition can be traced back to an antique custom, persistent in orthodoxy, with the purpose of preserving the ephemeral and perishable body for eternity and assuring the deceased’s peace.
Authors:P. Ubbrìaco, Angela Traini, and D. Manigrassi
The present research is concerning the characterization of FDR (fuel derived from residues) fly ash and mixtures with lime/brick
hydraulic binder by DTA/TG/DTG thermo-analysis, X-ray diffractometry and chemical analysis. The use of hydraulic binder obtained
from building brick rejects, which is less expensive than the usual solidifiers such as cementitious binder and silicates,
allows us to reutilize, in the meantime, this wreckage material, to the advantage of environmental sustainability. Fly ash
samples investigated in the present study were separated in a thermo-incineration plant. Mineralogical DTA/TG/DTG and XRD
investigations reveal the presence of different phases as well as chemical analysis shows a moderate concentration of heavy
metals and high content of chloride and sulphate. Results obtained from leaching tests with water carried out on hardened
pastes containing fly ash lead to interesting results, which highlight behaviour to the release of contaminants. The whole
of the results obtained in the present study make it possible to regard the objective of disposing such hardened materials
in inert waste landfill sites as achievable.
Combustion of brick-shaped carbonaceous materials
(carbon deposits from coke oven, coke and electrographite) was carried out
in thermobalance in static air. Analysis of kinetics of the process was carried
out using both classical (Arrhenius law) and newer (three-parametric equation)
methods. In classical approach two types of kinetic equations were used in
calculations: differential and integral. The results obtained show that, independently
on kinetic variables (α – conversion degree or m
– mass of sample) used in differential equations, kinetics of combustion
of brick-shaped carbonaceous materials is characterized by only one pair of
Arrhenius coefficients: activation energy (E)
and pre-exponential constant (A). At the
same time the integral equation demonstrates distinction in relation to methods
based on differential equations, generating higher activation energies and
separate isokinetic effect (IE). Parallel IE shows that kinetic analysis has
to encompass activation energy in connection to second coefficient, pre-exponential
constant A, depending on assumptions made
for kinetic equations. On the other hand three-parametric equation allows
describing kinetic of combustion in alternative way using only one experimental
value – initial temperature in form of point of initial oxidation (PIO)
– and also offers new methods of interpretation of the process.
Authors:H. Connan, A. Ray, P. Thomas, and J.-P. Guerbois
The utilisation of fired clay-brick waste is of interest in the manufacture
of building products due to both socio-economic and technological reasons.
Autoclaving is an established process for manufacturing calcium silicate-based
building products that affords rapid strength development. Clay-brick waste
represents a source of alternative silica, which is more reactive than conventionally
used silica and also contains alumina. This paper presents data on the effect
of lowering the autoclaving temperature from commonly practised 180 to 170°C
on OPC-quartz blends containing clay-brick fines as direct replacement of
quartz at 4.3, 8.6 and 12.9 mass percentages. The hydration products of autoclaved
OPC-quartz blends with clay-brick fines were characterised using simultaneous
DTA-TG in combination with other methods.