Use of Foam Polystyrene Waste in the Conditions of a Reinforced Concrete Products Factory

2020 ◽  
pp. 49-52
Author(s):  
S.E. YANUTINA ◽  
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Expanded Polystyrene ◽  
Insulation Material ◽  
Design Strength ◽  
Foam Polystyrene ◽  
Secondary Use ◽  
Concrete Blocks ◽  
Polystyrene Waste ◽  
Factory Laboratory

The relevance of research in the factory laboratory of JSC «198 KZHI», which is part of the HC GVSU «Center», is dictated by the need to dispose of foam polystyrene waste that occurs in large quantities when producing the precast concrete. In the production of three-layer external wall panels, polystyrene heatinsulating plates of the PPS 17-R-A brand are used as an effective insulation material. The secondary use of PPS 17-R-A for its intended purpose, as a heater, is not possible. The volume of foam polystyrene produced varies from 25 to 45 m3 per month. Utilization (disposal) of foam polystyrene waste is an expensive undertaking. Its use as a filler in the production of expanded polystyrene blocks was tested in the factory’s laboratory to produce foam polystyrene concrete with specified physical and mechanical characteristics. The results of testing of expanded polystyrene concrete of classes B2.5 and B 7.5 are presented. It is shown that under the conditions of the reinforced concrete factory technology, the production of polystyrene concrete blocks is possible with the achievement of the design strength. The information presented in the article is aimed at motivating specialists who produce recast concrete to the possibility of using foam polystyrene waste for low-rise construction. Keywords: foam polystyrene, ecology, energy efficiency, foam polystyrene concrete, foam polystyrene heat insulation plates, precast concrete.

scholarly journals INFLUENCE OF PHYSICAL PROPERTIES ON THERMAL CONDUCTIVITY OF POLYSTYRENE INSULATION MATERIALS

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Zahida Ademović ◽  
Jasmin Suljagić ◽  
Jasmin Zulić
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Chemical Properties ◽  
Expanded Polystyrene ◽  
Insulation Material ◽  
Physical And Chemical Properties ◽  
Foam Polystyrene ◽  
Coefficient Of Thermal Conductivity ◽  
Physical And Chemical ◽  
And Chemical Properties

Polymers based on polystyrene are widely used as thermoplastic materials due to the diversity in application, easy processability and a relatively low price. About 45% of the produced polystyrene is produced as compact and foamed products. Cellular foam polystyrene could be produced as expanded polystyrene (EPS) and extruded polystyrene (XPS) and is mainly used as insulation material. Therefore, physical and chemical properties of expanded and extruded polystyrene is of particular importance for thermal conductivity of the material. In this study, four types of expanded polystyrene were tested. Coefficient of thermal conductivity and the resistance of heat transfer were measured and compared to as well as mecahnical properties of the materials. It was confirmed that the density and thickness of the polystyrene influence the resistance of heat transfer.

scholarly journals The Use of Lightweight Brick and Bamboo on Lightweight Reinforced Concrete Panel Subject to Horizontal in-Plane Loading

2019 ◽  
Vol 9 (1) ◽  
pp. 1601-1603
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Concrete Block ◽  
Average Weight ◽  
Shear Cracks ◽  
Large Panel ◽  
Concrete Blocks ◽  
Cladding Panels ◽  
Failure Loads ◽  
Aerated Concrete

The lightweight panel is widely use in building infilled wall to reduce the building mass in lieu of brick walls. The present innovation works use bamboo and aerated concrete blocks into precast concrete panel. The average weight of the panel was 1650 kg/m3 compare to ordinary reinforced concrete 2200 kg/m3. Two type of panel dimension were used 40 cm x 80 cm x 3 cm and 60 cm x 120 cm x 4 cm. Bamboo reinforcement act as a structural framework of the panel and aerated concrete block (AAC block) functioning as infilled wall or cladding. Panels were loaded at the in- plane panels at two position, namely at the peak and at the middle panel height. When the load position was at the peak the average failure loads were120 N for small and large panel, the failure occurred at compression at top diagonal frame. when the load position was at mid panel, the average failure loads were140N for small panel and 260N for large panel, the failure occurred as shear cracks on the panel. The failure load of panel without aerated concrete blocks were130N for small panel and 215N for large panel.

Fiber-reinforced concrete in precast concrete applications: Research leads to innovative products

PCI Journal ◽  
2012 ◽  
Vol 57 (3) ◽  
pp. 33-46 ◽  
Author(s):  
Nemkumar Banthia ◽  
Vivek Bindiganavile ◽  
John Jones ◽  
Jeff Novak
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Innovative Products

scholarly journals Modified mortar pad behavior in the transfer of compressive stresses

2016 ◽  
Vol 9 (3) ◽  
pp. 414-434
Author(s):  
J. D. Ditz ◽  
M. K. EL Debs ◽  
G. H. Siqueira
Keyword(s):  
Precast Concrete ◽  
Concrete Strength ◽  
Compressive Load ◽  
Stress Transfer ◽  
Compressive Stresses ◽  
Bonded Phase ◽  
Concrete Blocks ◽  
Load Tests ◽  
Styrene Butadiene ◽  
Concrete Elements

ABSTRACT This research aims to analyze the compressive stress transfer between precast concrete elements using cement mortar pads modified with polypropylene fibers, styrene-butadiene latex and heat-expanded vermiculite. The stress transfer analyses are performed interleaving a cementbearing pad between two concrete blocks, subjecting the entire specimen to different compressive load tests. The parameters analyzed in the tests are: surface roughness (using bosses on the bonded phase of different thicknesses), compressive strength with monotonic and cyclic loadings. The main results obtained in this study are: a) the presence of pad increased the strength in 24% for thicknesses of imperfections of 0.5 mm and approximately 12% for smooth faces blocks; b) gain of effectiveness of the bearing pad when the concrete strength was reduced; c) for cyclic loading, the bearing pad increased in 48% the connections strength.

scholarly journals Experimental study of reinforced concrete pile caps with external, embedded and partially embedded socket with smooth interface

2013 ◽  
Vol 6 (5) ◽  
pp. 737-750
Author(s):  
R. Barros ◽  
J.S. Giongo
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Ultimate Load ◽  
Reference Model ◽  
Precast Concrete ◽  
Smooth Interface ◽  
Pile Cap ◽  
Pile Caps ◽  
Monolithic Connections ◽  
Scaled Models

On Precast concrete structures the column foundation connections can occur through the socket foundation, which can be embedded, partially embedded or external, with socket walls over the pile caps. This paper presents an experimental study about two pile caps reinforced concrete with external, partially embedded and embedded socket submitted to central load, using 1:2 scaled models. In the analyzed models, the smooth interface between the socket walls and column was considered. The results are compared to a reference model that presents monolithic connections between the column and pile cap. It is observed that the ultimate load of pile cap with external sockets has the same magnitude as the reference pile cap, but the ultimate load of models with partially embedded and embedded socket present less magnitude than the reference model.

scholarly journals Modeling of joint work of steel beam constructions with reinforced concrete ribbed floor slabs

2021 ◽  
pp. 44-57
Author(s):  
Yevhen Dmytrenko
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Precast Concrete ◽  
Concrete Slabs ◽  
Effective Width ◽  
Joint Work ◽  
Load Bearing ◽  
Reinforced Concrete Slabs ◽  
Industrial Buildings ◽  
Floor Slabs

Traditional methods of calculation of beam constructions of floors and coverings of industrial buildings assume their consideration when calculating separately from the frame structures, in particular, reinforced concrete slabs, without taking into account their joint work, which leads to a significant margin of safety. Today in Ukraine there is a significant number of industrial buildings and structures that need strengthening and reconstruction. In this regard, of particular importance are studies of the actual load-bearing capacity of the frames of single-storey and multi-storey industrial buildings, and both in the reconstruction and in new construction, the results of which will significantly reduce costs and more rationally design structures. At the same time, one of the most relevant areas is the study of the joint work of metal load-bearing structures with prefabricated reinforced concrete structures of rigid disks of coatings and floors in their calculation.           Moreover, in the national building codes, as well as in the educational and methodological literature, the calculation methods of taking into account the joint work of such constructions are not fully covered. The purpose of this work is to estimate the reduction of mass of the metal beam structure in its calculation in bending, taking into account the joint work with the rigid disk of the floor consist of precast concrete. As part of the study, the calculation of the floor beam according to the traditional calculation scheme - without taking into account the joint work with the floor slab, the calculation of its cross-section taking into account the joint work with floor slabs and experimental numerical study of the floor by the finite element method. Modeling of the floor fragment was performed in the software packages "SCAD Office" and "LIRA CAD 2019". Numerical research is aimed at verifying the feasibility of using the calculation methodology of DBN B.2.6-98-2009 to determine the effective width of the shelf when calculating the T-sections for prefabricated reinforced concrete slabs, which are included in the joint work with the floor beams. A comparative analysis of the obtained cross-section of the beam with the beam which was previously calculated by the traditional method of calculation  in stresses in the most dangerous cross section and the total mass of the beams. According to the results of the analysis, the correctness of the application of the above normative method for determining the effective width of the shelf of T-bending reinforced concrete elements was confirmed.

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