Seismic behavior of reinforced autoclaved aerated concrete wall panels

ce/papers ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 259-265
Author(s):  
Armin Taghipour ◽  
Erdem Canbay ◽  
Baris Binici ◽  
Alper Aldemir ◽  
Uğur Uzgan ◽  
...  
Keyword(s):  
Seismic Behavior ◽  
Concrete Wall ◽  
Autoclaved Aerated Concrete ◽  
Wall Panels ◽  
Aerated Concrete

Seismic behavior of autoclaved aerated concrete low rise buildings with reinforced wall panels

2019 ◽  
Vol 17 (7) ◽  
pp. 3933-3957
Author(s):  
Furkan Gokmen ◽  
Baris Binici ◽  
Alper Aldemir ◽  
Armin Taghipour ◽  
Erdem Canbay
Keyword(s):  
Seismic Behavior ◽  
Autoclaved Aerated Concrete ◽  
Wall Panels ◽  
Aerated Concrete

Seismic behavior and improvement of autoclaved aerated concrete infill walls

2019 ◽  
Vol 193 ◽  
pp. 68-81 ◽  
Author(s):  
Baris Binici ◽  
Erdem Canbay ◽  
Alper Aldemir ◽  
Ismail Ozan Demirel ◽  
Ugur Uzgan ◽  
...  
Keyword(s):  
Seismic Behavior ◽  
Infill Walls ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete

Reducing Heat Conduction of Autoclaved Aerated Concrete Wall Using Phase Change Material

2013 ◽  
Vol 807-809 ◽  
pp. 2779-2783
Author(s):  
Atthakorn Thongtha ◽  
Somchai Maneewan ◽  
Chantana Punlek ◽  
Yothin Ungkoon
Keyword(s):  
Heat Conduction ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Source ◽  
Concrete Wall ◽  
Autoclaved Aerated Concrete ◽  
Thermal Delay ◽  
Aerated Concrete ◽  
Change Material ◽  
Minimum Heat

In this work, the effect of the salt hydrated phase change material (PCM) on microstructure and heat conduction of the autoclaved aerated concrete (AAC) was studied. The microstructure in the AAC and AAC with composed phase change material was imaged by scanning electron microscopy (SEM). The ability in heat conduction was compared among AAC (AAC1), AAC with composed phase change material (0.417 (AAC2) and 0.833 (AAC3) kg/m2 in contents), and AAC which was composed by PCM (0.417 (AAC4) and 0.833 (AAC5) kg/m2 in contents) and was coated by the cement in 2 sides. These ones were tested the thermal delay at 40, 50 and 60 °C using the heater that was the thermal source. It was found that the optimum content of PCM on top surface was found at 0.417 kg/m2 because the minimum heat conduction and the lowest average temperatures of inside wall and inside room were shown in this sample at 40, 50 and 60 °C.

scholarly journals Thermal Effectiveness Enhancement of Autoclaved Aerated Concrete Wall with PCM-Contained Conical Holes to Reduce the Cooling Load

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2170 ◽  
Author(s):  
Atthakorn Thongtha ◽  
Aitthi Khongthon ◽  
Thitinun Boonsri ◽  
Chan Hoy-Yen
Keyword(s):  
Room Temperature ◽  
Time Lag ◽  
Testing Temperature ◽  
Thermal Source ◽  
Concrete Wall ◽  
Thermal Dynamics ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete ◽  
C 50 ◽  
Set Up

This work investigates and improves the thermal dynamics of autoclaved aerated concrete (AAC) wall containing phase change material (PCM). The PCM is paraffin wax loaded into conical holes drilled into the AAC. Filled AAC with three different numbers of PCM-filled holes (2, 3, and 4 conical holes, which are designated as AAC-2H, AAC-3H, and AAC-4H, respectively) as well as the unfilled original AAC were both tested under two different conditions: indoors (with controlled temperature) and outdoors (with actual weather). For the indoor experiment, a heater was used as a thermal source and set up to maintain the testing temperature at one of three levels: 40 °C, 50 °C, or 60 °C. The wall temperature was then measured on the surface with each horizontally-positioned wall as well as four different positions at various depths below the surface of the wall. It was found that AAC-4H was the optimum condition, which can produce outstandingly a time lag of approximately 27%, reduce a decrement factor of approximately 31%, and also decrease the room temperature. This reached approximately 9% when compared with that of ordinary AAC at the controlled testing temperature of 60 °C. All samples were further tested in actual weather to confirm the thermal performances of AAC-4H. Thermal effectiveness of AAC-4H was improved by extending approximately a 14.3% time lag, which reduces approximately a 4.3% decrement factor and achieving approximately 5% lower room temperature when compared with ordinary AAC.

Seismic behavior of steel frames with replaceable reinforced concrete wall panels

2016 ◽  
Vol 22 (5) ◽  
pp. 1055-1071 ◽  
Author(s):  
Hanheng Wu ◽  
Tianhua Zhou ◽  
Fangfang Liao ◽  
Jing Lv
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Steel Frames ◽  
Concrete Wall ◽  
Wall Panels ◽  
Reinforced Concrete Wall

scholarly journals CRACK RESISTANCE AND DURABILITY OF PRESTRESSED WALL PANELS CONSTRUCTED FROM CELLULAR CONCRETE

2018 ◽  
Vol 45 (2) ◽  
pp. 171-182
Author(s):  
D. K.-S. Bataev ◽  
M. A. Gaziev ◽  
H. N. Mazhiev ◽  
D. R. Mailyan
Keyword(s):  
Crack Resistance ◽  
Biaxial Compression ◽  
Concrete Wall ◽  
Concrete Panels ◽  
Wall Panels ◽  
Aerated Concrete ◽  
Useful Life ◽  
Prestressed Reinforcement ◽  
Initial Cracks ◽  
Cellular Concrete

ObjectivesThe aim of the studyis to develop ways to increase the crack resistance and durability of prestressed wall panels made of cellular concrete.MethodA complex study was carried out at the stage of factory manufacturing of two-module, aerated concrete wall panels with prestressed rods of class A-III reinforcing steel, 10 mm in diameter, located in the middle of the panel in the longitudinal and transverse directions.ResultsIt was found that the total stress losses in straining rods prior to casting of the aerated concrete mix, connected with stress relaxation in the reinforce and with deformations of the headings of the straining rods in the gripping jaws, the steel mould deformations, as well as the losses after the panel exit from the autoclave during the transfer of force to the concrete, are 15-20% of the initial level. At the same time, depending on the dimensions of the straining rods, the length of the strain transfer zone was in the range of 150 to 250 mm. A study of the effect of pre-compression on the closure of possible technological cracks in concrete test panels showed that, due to biaxial compression of concrete, new cracks do not appear when they work on bending and stretching (during the decking and transportation). Moreover, initial cracks that sometimes can appear during the autoclave processing become closed.ConclusionComparative tests of prestressed and typical panels for short-term load in accordance with GOST 8829-94 requirements indicate a significant increase in their rigidity and crack resistance, as well as the shear strength of their bridge part. The design of straining reinforcing rods with the end transverse anchor in the form of a horseshoe, together with attached flat welded frameworks made of Vr-I wire with a diameter of 5 mm, which are installed along the contour of the window openings of the test panels, ensure its reliable adhesion to cellular concrete and effective anchoring in the panel's body until the end of its useful life. Biaxial prestressed reinforcement by single rods in combination with conventional frame reinforcement opens up possibilities for the production of external wall panels from non-autoclaved cellular concrete with ordinary heat treatment, instead of ceramsite concrete panels.

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