The increase of compressive strength of natural polymer modified concrete with Moringa oleifera

International Journal of Engineering Research and Technology

S²,

Rianto³

et al. 2020

Durability of concrete masonry wall in marine environment is a big issue that related to the deterioration of the structure exposed to seawater. Therefore, proper retrofitting should be done effectively to gain high durability of the structure. This research aims to: (1) developed eco-concrete bricks that were implemented to retrofit masonry wall in tidal prone area; and (2) to investigate durability as well as compressive strength development of concrete bricks produced in the laboratory and applied to masonry wall for 14 months. Research activities consisted of: (1) Experimental activities of concrete bricks mix design optimizing, production, and compressive strength test of concrete brick specimens; (2) Field application which consisted of masonry wall retrofitting by eco-concrete bricks, and (3) Core Drill of concrete masonry wall and compressive strength test of the Core Drill specimens. The concrete bricks made of natural polymer such as Moringa oleifera, Gracilaria Sp., and also honey. Masonry walls were built in Sriwulan village as tidal prone area and in Pucang Gading as dry and lowland area. Results have shown that K1-K3 series of eco-concrete bricks were the optimum composition with compressive strength of 15.88 MPa and 16.13 MPa. Eco-concrete bricks of K3 series applied to the broken masonry wall for retrofitting. Good performance of compressive strength of Core Drill specimens tested at age 14 month have shown about four times (73.84 MPa) for specimens of Pucang Gading village and about three times (58.61 MPa) of Sriwulan village. Eco-concrete bricks with natural polymers of Moringa oleifera, Gracilaria Sp., and also honey have proven great performance in durability and compressive strength increase.

Section: Introductionmentioning

confidence: 80%

“…K1-B K1-C K3-A K3-B K3-C Linear (K1-A K1-B K1-C K3-A K3-B K3-C)International Journal of Engineering Research and Technology. ISSN 0974-3154 Vol 13,. No.3 (2020), pp.…”

mentioning

confidence: 99%

Masonry Walls Retrofitting with Eco-Concrete Bricks in Tidal Flooding Prone Area

International Journal of Engineering Research and Technology

S²,

Rianto³

et al. 2020

“…Instead of analytical calculation, research of [13] that reported average compressive strength of 40.30 MPa of masonry wall without strengthening in the same site will be compared to this current investigation. It should be noted that applied natural polymers for the bricks as also investigated by [14]- [17].…”

Section: III Materialsmentioning

confidence: 99%

Evaluating Couple Simple Shear Wall as Low-cost Masonry Wall Strengthening by Rebound Hammer Test

International Journal of Engineering Research and Technology

Febrina²,

Fitra³

2020

Shear wall known as high performance structure to resists seismic load. It has important that shear wall can be applied to masonry building as bearing wall in simple way, high performance, and low-cost. Therefore, this research wants to develop a simple way as well as simple shear walls that are connected by column as stiffer couple to strength the masonry wall. The aim of this research is to investigate compressive strength of couple simple shear wall compared to analytical compressive strength and also compressive strength of previous research. There were two couples of simple shear wall built on site, one was strengthening of the outer side of house wall and the other one was strengthening of the inner of masonry wall border edging, which are connected with column that placed at the edge and also in the corner. Each wall has dimension of 1 x 1 x 0.2 m while the column dimension was 0.20 x 0.20 m. Field application in this research followed by Rebound Hammer Test. The field result then compared of theoretical compressive strength and compressive strength of previous research. It is proven that couple simple shear wall easy to build and low-cost as well as simple design, ease for construction, and effectively strengthens the wall. The couple simple shear wall compressive strength was higher compared to compressive strength of masonry walls without strengthening and the theoretical compressive strength.

“…Generally, the use of polymer is important to improve the mechanic properties such as compressive strength, bond mechanism, setting time, water absorption, vibration damping, etc [3]. Some chemical and organic polymers have been used and developed to gain high performance of mortar and concrete [3][4][5][6][7][8][9][10]. However, there is still an uncertainty about the performance of organic polymer mortar as green material (spending less energy than chemical ones) which has high performance and durability as well as the chemical ones, as it is debatable to claim that polymer concrete or mortar will gain maximum strength at short or long term [11].…”

Section: Introductionmentioning

confidence: 99%

Carbohydrate Polymers for Green Multi-Purpose Mortar

International Journal of Engineering Research and Technology

Suryanto²,

Pramana³

2020

Concrete and mortar polymer have been developed to gain high strength and durability. Instead of chemical polymer, organics polymer is widely used as material innovation. This research aims to investigate the performance as well as its compressive strength of carbohydrates polymer for multi-purposes mortar with amylum powder and honey to be used for multipurpose mortar. There were 285 cubes of mortar specimens 50 x 50 x 50 mm with basic composition weight ratio of cement : sand : water = 1 : 1 : 0.6 with addition of amylum powder and honey tested for compressive strength. The result found optimum composition of specimen series is KT-M-0-G which contains honey 0.03% and amylum 0.1% of cement weight with compressive strength of 37.44 MPa. The comparison of compressive strength of mortar in current investigation to the previous researches as reference has shown higher compressive strength of specimen series without honey but very low compressive strength to specimen series with honey. This research confirms that mortar with carbohydrates polymer can be used for multipurpose mortar because it has high performance of strength and durability.