Mix-design method of self-compacting concretes for pre-cast industry

2009 ◽  
Vol 36 (9) ◽  
pp. 1459-1469 ◽  
Author(s):  
J. Shen ◽  
I. Yurtdas ◽  
C. Diagana ◽  
A. Li
Keyword(s):  
Compressive Strength ◽  
Packing Density ◽  
Design Method ◽  
Design Methods ◽  
Mix Design ◽  
Early Age ◽  
Self Compacting Concrete

Some mix-design methods for self-compacting concrete (SCC) have been proposed since the 1990s, but these methods do not address all practical needs. This paper proposes a method that enables the composition of SCC to be designed for a given strength (in this study, from 10 to 50 MPa at age 1 day or from 30 to 70 MPa at age 28 days). In this method, the compressive strength of SCC at an early age is considered an important parameter to answer the needs of the precast industry. The proposed mix-design method is based on optimizing the packing density of aggregates and ensuring the necessary quantity of paste to fill the voids between aggregates and to provide good fluidity of the SCC. The compressive strength of SCC can be estimated according to the Bolomey formula, and the quantity of superplasticizer can be determined by the proposed method.

Experimental Research on Compressive Strength of Self-Compacting Concrete with Recycled Coarse Aggregates

2011 ◽  
Vol 306-307 ◽  
pp. 1084-1087 ◽  
Author(s):  
Jing Li ◽  
Xian Feng Qu ◽  
Lin Fu Wang ◽  
Chong Qing Zhu ◽  
Juan Li
Keyword(s):  
Compressive Strength ◽  
Design Method ◽  
Self Compacting Concrete ◽  
Longitudinal Splitting ◽  
Coarse Aggregates ◽  
Hydraulic Concrete ◽  
Mix Proportion ◽  
Splitting Failure ◽  
Concrete Blocks ◽  
Waste Solid

In order to study cubic compressive strength of recycled coarse aggregates-filled concrete systematically, recycled coarse aggregates with the particle size from 50 to150mm are made from waste solid contents, which are artificially broken from abandoned rubble and concrete blocks. Based on the mix proportion design method of ordinary concrete and test code for hydraulic concrete, 3 groups of recycled coarse aggregates-filled concrete cubic specimens were prepared and the compressive strength of the specimens were tested. The results showed that basic failure pattern of recycled coarse aggregates-filled concrete are longitudinal splitting failure, and that cubic compressive strength is higher than that of self-compacting concrete.

scholarly journals Delivering Sustainable Solutions through Improved Mix and Structural Design Functions for Bitumen Stabilised Materials

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
K. J. Jenkins ◽  
C. E. Rudman ◽  
C. R. Bierman
Keyword(s):  
Structural Design ◽  
Best Practice ◽  
Design Method ◽  
Design Procedure ◽  
Design Methods ◽  
Mix Design ◽  
Sustainable Solutions ◽  
Bitumen Emulsion ◽  
Design Function ◽  
Foamed Bitumen

The evolution of cold recycling using bitumen stabilisation technology has been supported by progressive research initiatives and best practice guidelines. The first generic guidelines for bitumen stabilised materials (BSMs) were published only in 2002. These guidelines provided a generic approach for the analysis of foamed bitumen and bitumen emulsion technologies. From that point, bitumen stabilisation became the common term for the inclusion of either of the two bituminous binders. The TG2 2nd edition guideline of 2009 took a bold step recognising the shear properties of the bitumen stabilised material (BSM) as the key performance indicators. In addition, advancements in structural design and application of BSMs provided practitioners with robust guidelines. The subsequent decade has provided an opportunity to interrogate data from more than 300 BSM mix designs and 69 LTPP sections. The data have led to research developments including significant new performance properties of BSMs, refined mix design methods, and updated new pavement design methods. This includes an entire design process that has been updated with a streamlined mix design procedure and a new frontier curve for the pavement number design method, as well as a new mechanistic design function. It is anticipated that the research findings and implementation of the newly developed technology will lead to improved application in BSM technology.

Investigating the Application of DOE Method in Designing a High-Strength and High-Performance Concrete

2014 ◽  
Vol 875-877 ◽  
pp. 776-780
Author(s):  
Mojtaba Valinejad Shoubi ◽  
Azin Shakiba Barough ◽  
Iman Kiani
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
High Performance Concrete ◽  
Design Method ◽  
High Strength ◽  
Mix Design ◽  
Design Calculation ◽  
Concrete Mix Design ◽  
Compressive Strength Test ◽  
Chloride Attack

Concrete is the main material used in most of structures in the world. The use of high strength and high performance concrete to overcome deterioration due to static and dynamic load and some environmental burden in different situation such as chloride attack, sulphate attack and etc, is increasing worldwide. Achieving to a concrete with a high quality and saving in amount of material used for producing the concrete need a proper mix design method taken into account. DOE method is considered as an effective and substantial method in implementing the concrete mix design. In this paper, specifications and all mix design calculation steps using DOE method in achieving a high strength and high performance concrete for a tall building in a coastal environment based on three concrete cubes specimens produced in the lab, are investigated. The 7 and 14 day compressive strength test were implemented on the concrete cubes. At the end, it concluded that the specified compressive strength (45 N/mm2) can be achieved on the 28th day based on DOE method.

scholarly journals Variasi Abu Ampas Tebu dan Serat Bambu sebagai Bahan Campuran Pembuatan Beton Ramah Lingkungan

2020 ◽  
Vol 4 (2) ◽  
pp. 109-117
Author(s):  
Warsito Warsito ◽  
Anita Rahmawati
Keyword(s):  
Compressive Strength ◽  
Sugarcane Bagasse ◽  
Design Method ◽  
Low Cost ◽  
Waste Product ◽  
American Concrete Institute ◽  
Raw Material ◽  
Mix Design ◽  
Fine Aggregate ◽  
The Times

ABSTRAKBeton merupakan suatu material yang secara umum menjadi kebutuhan masyarakat terhadap fasilitas infrastruktur konstruksi yang semakin meningkat seiring dengan perkembangan zaman, oleh sebab itu pemilihan beton sebagai bahan baku utama konstruksi bangunan sangatlah penting. Beberapa hal yang perlu ditinjau dalam pembuatan beton adalah harganya relatif murah, mudah diperoleh, memiliki kuat tekan tinggi serta mempunyai sifat tahan terhadap faktor kondisi lingkungan. Abu Ampas Tebu (AAT) adalah sisa hasil pembakaran dari ampas tebu. Ampas tebu sendiri merupakan hasil limbah buangan yang berlimpah dari proses pembuatan gula. Tujuan penelitian ini dimaksudkan untuk mengetahui kuat tekan beton yang menggunakan serat bambu dan abu ampas tebu sebagai pengganti agregat halus dengan variasi tertentu yang mencapai 40%. Penelitian ini menggunakan metode kuantitatif eksperimen dan teknik analisa data menggunakan regresi. Variabel yang digunakan dalam penelitian ini adalah variabel bebas yang berupa variasi penggantian sebagian agregat halus menggunakan abu ampas tebu dan serat bambu. Hasil penelitian ini adalah beton dengan perbandingan komposisi campuran yang didapat sebelumnya dan hasil mix design beton normal maut sedang yaitu dengan besar kuat tekan fc’ 14,5 Mpa (K175) sampai dengan fc’17,15 Mpa (K210,6) yang kemudian ditambah dengan bahan AAT sebagai bahan penambah semen dan serat Bambu.Kata Kunci: Abu Ampas Tebu, Beton, Serat Bambu, Agregat ABSTRACTConcrete is a material that generally supports the community's need for construction of infrastructure facilities which is increasing along with the times. Selection of concrete as the main raw material for building construction is very important. There are benefits in making concrete such as low cost, ease to obtain, high compressive strength and resistancy to environmental conditions. Bagasse Ash (AAT) is the residue from the burning of sugarcane bagasse. Sugarcane bagasse itself is an abundant waste product from the sugar making processes. The purpose of this study was to determine the compressive strength of concrete using bamboo fibers and the AAT as a substitute for fine aggregate with certain variations reaching up to 40% with a concrete enhancer chemical aggregate. This research used the American Concrete Institute design method with a value of 0.40 and 0.45 on the concrete age of 28 days. Results found that the samples made were hard concrete with a comparison of the composition of the mixture obtained previously. Results of a normal deadly concrete mix design comprised with a large compressive strength fc '14.5 Mpa (K175) to fc '17, 15 Mpa (K210,6) which was then added to the AAT as aggregates in the cement and Bamboo fiber.Keywords: Bagasse Ash, Concrete, Bamboo, Aggregate

scholarly journals EFFECT FACTORS’ SELECTION AND PREDICTION OF COMPRESSIVE STRENGTH OF SCC USING A HYBRID NETWORK BASED ON GA

2021 ◽  
Vol 30 (2) ◽  
Author(s):  
Wei Liang ◽  
Ming Lin ◽  
Jiangfeng Dong ◽  
Shucheng Yuan
Keyword(s):  
Compressive Strength ◽  
Design Method ◽  
Back Propagation ◽  
Hybrid Networks ◽  
Hybrid Network ◽  
Coefficient Of Determination ◽  
Self Compacting Concrete ◽  
Concrete Production ◽  
Bp Model

Compressive strength is the most important evaluation index for concrete. In order to predict the compressive strength of self-compacting concrete, two kinds of artificial neural networks (ANNs), including the BP (Back-propagation) networks and the hybrid networks DRGA-BP based on GA (Genetic algorithm), were designed and applied in this study. With DRGA-BP, the most representative variables were selected out from many initial inputs to reduce data dimensions and also the weights and thresholds of BP model were optimized. The results showed that the hybrid model presented better prediction accuracy with the R2 (coefficient of determination) of 0.9602, and appeared to well agree with the experimental data and was quite reliable. Finally, a mix ratio design method based on DRGA-BP model was proposed for reducing material waste and saving time in the process of concrete production with continuous adjustment.

scholarly journals Variasi Abu Ampas Tebu dan Serat Bambu sebagai Bahan Campuran Pembuatan Beton Ramah Lingkungan

2020 ◽  
Vol 4 (2) ◽  
pp. 109-117
Author(s):  
Warsito Warsito ◽  
Anita Rahmawati
Keyword(s):  
Compressive Strength ◽  
Sugarcane Bagasse ◽  
Design Method ◽  
Low Cost ◽  
Waste Product ◽  
American Concrete Institute ◽  
Raw Material ◽  
Mix Design ◽  
Fine Aggregate ◽  
The Times

ABSTRAKBeton merupakan suatu material yang secara umum menjadi kebutuhan masyarakat terhadap fasilitas infrastruktur konstruksi yang semakin meningkat seiring dengan perkembangan zaman, oleh sebab itu pemilihan beton sebagai bahan baku utama konstruksi bangunan sangatlah penting. Beberapa hal yang perlu ditinjau dalam pembuatan beton adalah harganya relatif murah, mudah diperoleh, memiliki kuat tekan tinggi serta mempunyai sifat tahan terhadap faktor kondisi lingkungan. Abu Ampas Tebu (AAT) adalah sisa hasil pembakaran dari ampas tebu. Ampas tebu sendiri merupakan hasil limbah buangan yang berlimpah dari proses pembuatan gula. Tujuan penelitian ini dimaksudkan untuk mengetahui kuat tekan beton yang menggunakan serat bambu dan abu ampas tebu sebagai pengganti agregat halus dengan variasi tertentu yang mencapai 40%. Penelitian ini menggunakan metode kuantitatif eksperimen dan teknik analisa data menggunakan regresi. Variabel yang digunakan dalam penelitian ini adalah variabel bebas yang berupa variasi penggantian sebagian agregat halus menggunakan abu ampas tebu dan serat bambu. Hasil penelitian ini adalah beton dengan perbandingan komposisi campuran yang didapat sebelumnya dan hasil mix design beton normal maut sedang yaitu dengan besar kuat tekan fc’ 14,5 Mpa (K175) sampai dengan fc’17,15 Mpa (K210,6) yang kemudian ditambah dengan bahan AAT sebagai bahan penambah semen dan serat Bambu.Kata Kunci: Abu Ampas Tebu, Beton, Serat Bambu, Agregat ABSTRACTConcrete is a material that generally supports the community's need for construction of infrastructure facilities which is increasing along with the times. Selection of concrete as the main raw material for building construction is very important. There are benefits in making concrete such as low cost, ease to obtain, high compressive strength and resistancy to environmental conditions. Bagasse Ash (AAT) is the residue from the burning of sugarcane bagasse. Sugarcane bagasse itself is an abundant waste product from the sugar making processes. The purpose of this study was to determine the compressive strength of concrete using bamboo fibers and the AAT as a substitute for fine aggregate with certain variations reaching up to 40% with a concrete enhancer chemical aggregate. This research used the American Concrete Institute design method with a value of 0.40 and 0.45 on the concrete age of 28 days. Results found that the samples made were hard concrete with a comparison of the composition of the mixture obtained previously. Results of a normal deadly concrete mix design comprised with a large compressive strength fc '14.5 Mpa (K175) to fc '17, 15 Mpa (K210,6) which was then added to the AAT as aggregates in the cement and Bamboo fiber.Keywords: Bagasse Ash, Concrete, Bamboo, Aggregate

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