scholarly journals Mechanical Behavior of Recycled Concrete Aggregates (RCA) for Improved Sustainability of Reinforced Concrete Building Structures

◽  
2016 ◽  
Author(s):  
Andres de la Rosa ◽  
◽  
Mark Davis ◽  
Brad Weldon ◽  
Yahya Kurama ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Behavior ◽  
Recycled Concrete ◽  
Building Structures ◽  
Reinforced Concrete Building ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates ◽  
Concrete Building

Design Guidelines of FRP Reinforced Concrete Building Structures

1997 ◽  
Vol 1 (3) ◽  
pp. 90-115 ◽  
Author(s):  
Yasuhisa Sonobe ◽  
Hiroshi Fukuyama ◽  
Tadashi Okamoto ◽  
Nagahide Kani ◽  
Kouzou Kimura ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Design Guidelines ◽  
Building Structures ◽  
Reinforced Concrete Building ◽  
Concrete Building

scholarly journals Mechanical Behavior of a Composite Lightweight Slab, Consisting of a Laminated Wooden Joist and Ecological Mortar

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2575
Author(s):  
Carmelo Muñoz-Ruiperez ◽  
Francisco Fiol Oliván ◽  
Verónica Calderón Carpintero ◽  
Isabel Santamaría-Vicario ◽  
Ángel Rodríguez Sáiz
Keyword(s):  
Laboratory Test ◽  
Mechanical Behavior ◽  
Failure Load ◽  
Full Scale ◽  
Recycled Concrete ◽  
Test Results ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates ◽  
Laboratory Test Results ◽  
Lightweight Mortar

The investigation reported in this paper is an evaluation of the mechanical behavior of full-scale ecological mortar slabs manufactured with a mixture of expanded clay and recycled concrete aggregates. The composite mortars form a compressive layer over laminated wooden joists to form a single construction unit. To do so, full-scale flexural tests are conducted of the composite laminated wood-ecological mortar slabs with different types of mortar designs: reference mortar (MR), lightweight mortar dosed with recycled concrete aggregates (MLC), and lightweight mortar dosed with recycled mixed aggregates (MLM). The test results showed that the mortar forming the compression layer and the laminated wooden joists worked in unison and withstood a higher maximum failure load under flexion than the failure load of the wooden joists in isolation. Moreover, the laboratory test results were compared with the simulated values of the theoretical model, generated in accordance with the technical specifications for structural calculations contained in the Spanish building code, and with the results calculated by a computer software package. From the analysis of the results of the calculation methods and the full-scale laboratory test results, it was concluded that the safety margin yielded by the calculations validated the use of those methods on this type of composite slab. In this way, a strong mixed wood–mortar slab was designed, contributing little dead-load to the building structure and its manufacture with recycled aggregate, also contributes to the circular economy of construction materials.

MODEL BIAYA TIDAK LANGSUNG PROYEK STRUKTUR GEDUNG BETON BERTULANG

1970 ◽  
Author(s):  
I Ketut Nudja S ◽  
I N. Sutarja ◽  
Mayun Nadiasa
Keyword(s):  
Reinforced Concrete ◽  
Indirect Cost ◽  
Cost Model ◽  
Linear Regression Analysis ◽  
Indirect Costs ◽  
Direct Costs ◽  
Accounting System ◽  
Building Structures ◽  
Reinforced Concrete Building ◽  
Concrete Building

The cost of the project itself , in line with the accounting system which consists of direct costs and indirect costs . Contractor in determining competitive bidding strategy, should propose a cost which include estimate real cost plus mark up . Based on observations at PT. Sarana Bangun Ragam Cipta, a contractor company , found that the company does not  follow the rules mentioned above, Besides that the book keeping system for the project cost has not implemented a financial accounting system properly , so that the  proportion of direct costs and indirect costs of each project is un know. It required a study to be conducted to  determine the proportion of direct costs to indirect costs and indirect cost model. Quantitative research was conducted on the 12 (twelve ) project of  reinforced concrete building structures using two (2 ) independent variables , namely the direct costs ( X1 ) and duration ( X2 ) and 1 ( one ) dependent variable , ie indirect costs (? ) . Descriptive analysis to determine the proportion of indirect costs to direct costs . Analysis of data using multiple linear regression analysis to determine the indirect cost model of reinforced concrete building structures projects. From analysis found the average proportion of indirect costs to direct cost was 8.50 % , meanwhile  indirect cost model is ? = - 1.462E7 + 0.056 ( X1 ) + 558,775.937 ( X2 ) , where : ? = Indirect costs ( Rp . ) , X1 = direct costs (Rp .) , X2 = Duration ( days ) . The proportion of indirect costs can be used to calculate indirect costs = 0.085 x direct costs and the above model can also be used to predict the value of ? with accuracy 90% or at ? (±) 0.10, if the values ??of X1 and X2 is know on popolation where the data is taken

Sign in / Sign up

Export Citation Format

Share Document