scholarly journals Durability study of lightweight concrete material made from date palma seeds (DPS)

2010 ◽  
Author(s):  
M. Almograbi
Keyword(s):  
Lightweight Concrete ◽  
Concrete Material

scholarly journals Development of an Ultra-Lightweight Thin Film Polymer Modified Concrete Material

2011 ◽  
Vol 466 ◽  
pp. 131-139 ◽  
Author(s):  
Deon Kruger ◽  
Michael van der Westhuizen
Keyword(s):  
Lightweight Concrete ◽  
In Situ Testing ◽  
Concrete Material ◽  
Performance Requirements ◽  
Practical Evaluation ◽  
Precast Elements ◽  
Polymer Modified Concrete ◽  
Strength And Durability ◽  
Film Polymer

Certain construction situations call for the use of ultra-lightweight concrete materials. The properties of such materials allow for the utilisation of concrete in weight critical applications, for example precast elements, roofing panels, flooring and cladding of structures. The weight saving benefits of lightweight concrete are evident, yet a trade-off in the strength and durability characteristics of the concrete are made. This paper sets out to develop an ultra-lightweight thin filmed polymer modified concrete material for such applications. This material may incorporate specialised aggregates and admixtures to meet performance requirements but the effects of these on the performance of the lightweight concrete are to be carefully evaluated. This paper presents some of the results obtained by means of laboratory testing as well in-situ testing. As part of the in-situ testing, the paper also reports on the practical evaluation of the ultra-lightweight material characteristics performed through the construction of a light weight concrete racing canoe. This allowed for the evaluation of the material performance characteristics and the establishment of acceptable work and application methods when constructing with this material.

Sludge Ash as Lightweight Concrete Material

1989 ◽  
Vol 115 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Joo‐Hwa Tay ◽  
Woon‐Kwong Yip
Keyword(s):  
Lightweight Concrete ◽  
Concrete Material ◽  
Sludge Ash

scholarly journals Improved Quality Lightweight Concrete Active Pozzoland Waste Tile As Filler With 900°C Fuel Temperature

2019 ◽  
Vol 280 ◽  
pp. 05011
Author(s):  
Moh. Fadli Yusriansyah ◽  
Hernu Suyoso ◽  
Nanin Meyfa Utami
Keyword(s):  
Compressive Strength ◽  
Aluminum Powder ◽  
Test Object ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
Waste Utilization ◽  
Fuel Temperature ◽  
Concrete Material ◽  
Earthquake Force ◽  
Light Density

The earthquake is a serious threat in the field of construction in archipelagic countries like Indonesia. The heavier the building is, the greater the earthquake force produced. Lightweight concrete is a concrete that has a light density and contains lightweight aggregate. According to SNI-03-3449-2002 lightweight concrete has a weight of not more than 1850 kg / m3. The innovations used are not limited to the addition of aluminum powder additives but also the utilization of waste as a concrete material as an alternative in waste utilization. The result of the addition of tile powder used as filler in each variation can not increase the value of compressive strength but all the result of the test object still meet the criteria of light concrete that is under 1850 kg / m3. The increase in compressive strength occurs in variations 3 and 5 but does not exceed variation 1. In the 5x5 cm paste specimen, the material is mixed without the use of aluminum powder, the results are more optimal, the data obtained is more accurate, this is due to the method of making pasta with only cement and tile dust no material is wasted.

scholarly journals Testing of nutmeg shell as a lightweight concrete material in terms of volume weight and compressive strength value

2021 ◽  
Vol 3 (2) ◽  
pp. 113-118
Author(s):  
Budiman Budiman
Keyword(s):  
Compressive Strength ◽  
Lightweight Concrete ◽  
Research Result ◽  
Lightweight Aggregate ◽  
Laboratory Research ◽  
Lightweight Aggregate Concrete ◽  
Dead Weight ◽  
Concrete Material ◽  
Volume Weight ◽  
Lightweight Structure

Lightweight concrete can be defined as a type of concrete which includes an expanding agent in that it increases the volume of the mixture while giving additional qualities such as nailibility and lessened the dead weight. The nutmeg shell has the characteristics of light and hard skin testure so that it has the potential to be used as a material for lightweight concrete. The purpose of this study is to determine the aggregate characteristic value and the compressive strength value of concrete using the DOE (department of environment) method and referring to standards SNI. Variation of use nugmet shell toward the weight volume of concrete is 10%, 20%, 30%, 40% and 50%. This research is a sample-based laboratory research and analysis of aggregate characteristics and concrete compression test. The research result shows that the use of nutmeg skin as a coarse aggregate material in the concrete mixture affects the volume weight of the concrete. The weight of the concrete gets lighter along with the higher the percentage used. The average volume weight obtained was 1810.06 kg / m3. Based on the weight of the concrete sample, it is classified as light structure, includes concrete with low density and includes lightweight aggregate concrete. The compressive strength values for the characteristics of concrete at a composition of 10%, 20% and 30% were obtained at 28.42 kg/cm2, 31.65 kg/cm2 and 32.68 kg/cm2 which increased while the use of nutmeg shells at 40% and 50% compositions was obtained. values of 29.09 kg/cm2 and 27.38 kg/cm2 decreased at the age of 28 days. The increase in the value of the compressive strength of concrete (fck') occurred starting at the composition of 20% and 30% at 10.20% and 13.03% and begin to decrease at the composition of 50% by 3.65%. Lightweight concrete from nutmeg shells has an weight of 1810,06 kg/m3 and a maximum compressive strength value of 3,2 MPa so that the concrete is in the category lightweight structure.

scholarly journals The Use of Nutmeg Shell as a Lightweight Concrete Material

2020 ◽  
Vol 7 (2) ◽  
pp. 116
Author(s):  
Budiman Budiman ◽  
Imran Imran ◽  
James WTP
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Research Result ◽  
Concrete Mixture ◽  
Average Weight ◽  
Concrete Aggregate ◽  
Concrete Material ◽  
Maximum Compressive Strength

Lightweight concrete is concrete that has a lighter density than concrete in general. Nutmeg shell utilization as coarse aggregate is expected to be the added material in the lightweight concrete mixture. The purpose of this study is to determine characteristics of the concrete aggregate and the compressive strength of the concrete design based on the DOE (Department of Environment) method and the SNI Standard. In this research, the use of nugmet shell was varied as follows: 10%, 20%, 30%, 40% and 50% of the concrete weight. The research result shows that the amount of nugmet shell used into the concrete mixture affects the compressive strength of the concrete characteristics (fck’). The compressive strength of the concrete characteristics increases with the increase in the amount of nutmeg shell used in the concrete mixture. The compressie strength increases consecutively from  28.42 kg /cm2, 31.65 kg / cm2 to 32.68 kg /cm2 with the increase in the amount of nutmeg shell: 10%, 20% and 30%. Then, it decreases into 29 , 09 kg /cm2 and 27.38 cm2 with further increasing 40% and 50% nutmeg shell of the concrete weight. The average weight of the concrete mixture using nutmeg shell was 1202 kg/m3with the maximum compressive strength value of 3.2 MPa, thus it could be categorized as the lightweight concrete.    

The Still Life of Objects – Heidegger, Schapiro, and Derrida reconsidered

2015 ◽  
Vol 60 (1) ◽  
pp. 81-102
Author(s):  
KErstin Thomas
Keyword(s):  
Still Life ◽  
Work Of Art ◽  
Concrete Material ◽  
Vincent Van Gogh ◽  
Starting Point ◽  
Specific Object ◽  
Truth Claims ◽  
The Common ◽  
Critical Intervention ◽  
The Given

Kerstin Thomas revaluates the famous dispute between Martin Heidegger, Meyer Schapiro, and Jacques Derrida, concerning a painting of shoes by Vincent Van Gogh. The starting point for this dispute was the description and analysis of things and artworks developed in his essay, “The Origin of the Work of Art”. In discussing Heidegger’s account, the art historian Meyer Schapiro’s main point of critique concerned Heidegger’s claim that the artwork reveals the truth of equipment in depicting shoes of a peasant woman and thereby showing her world. Schapiro sees a striking paradox in Heidegger’s claim for truth, based on a specific object in a specific artwork while at the same time following a rather metaphysical idea of the artwork. Kerstin Thomas proposes an interpretation, which exceeds the common confrontation of philosophy versus art history by focussing on the respective notion of facticity at stake in the theoretical accounts of both thinkers. Schapiro accuses Heidegger of a lack of concreteness, which he sees as the basis for every truth claim on objects. Thomas understands Schapiro’s objections as motivated by this demand for a facticity, which not only includes the work of art, but also investigator in his concrete historical perspective. Truth claims under such conditions of facticity are always relative to historical knowledge, and open to critical intervention and therefore necessarily contingent. Following Thomas, Schapiro’s critique shows that despite his intention of giving the work of art back its autonomy, Heidegger could be accused of achieving quite the opposite: through the abstraction of the concrete, the factual, and the given to the type, he actually sets the self and the realm of knowledge of the creator as absolute and not the object of his knowledge. Instead, she argues for a revaluation of Schapiro’s position with recognition of the arbitrariness of the artwork, by introducing the notion of factuality as formulated by Quentin Meillassoux. Understood as exchange between artist and object in its concrete material quality as well as with the beholder, the truth of painting could only be shown as radically contingent. Thomas argues that the critical intervention of Derrida who discusses both positions anew is exactly motivated by a recognition of the contingent character of object, artwork and interpretation. His deconstructive analysis can be understood as recognition of the dynamic character of things and hence this could be shown with Meillassoux to be exactly its character of facticity – or factuality.

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