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Enhancement of high strength concrete performance by utilising nano waste paper sludge ash
Aidan,Newman,1, Nuradila,Izzaty,Halim,2, Muhd,Norhasri,Muhd,Sidek,3, Hamidah,Mohd,Saman,4, Anizahyati,Alisibramulisi,5.
ABSTRACT
High strength concrete (HSC) is an amazing breakthrough in the history of
construction material. Due to its high strength, durability, and economic
value, it has been used in large-scale construction with a unique structure
design not achievable by conventional concrete. However, HSC uses a
high amount of cement powder which contributes to its overall strength.
However, it will require high cement consumption and increases carbon
dioxide emission. Waste paper sludge ash (WPSA) is utilised in cement
and has improved concrete properties. Nano engineered WPSA might
further enhance HSC capabilities. This research focused on the physical
and fresh properties of HSC with partial replacement of nano-engineered
WPSA to cement through experimental investigation. The HSC produced
in this research has a targeted strength of more than 40MPa with a fixed
water-cement ratio of 0.2. The WPSA was oven-dried and was sieved to
a particle size of 212 micrometers. Then, it was milled until a nano-size
particle is obtained. The nano WPSA is used to replace cement in the HSC
mix with a replacement percentage of 1%, 3%, 5%, 7%, and 10%. The new
properties of the concrete were measured by conducting the flow table test,
and the physical property was determined by conducting the compressive
test. Compressive tests were conducted for 1, 3, 7, 14, and 28 days with
a cube sample size of 50mm x 50mm x 50mm. This research shows that
1% of nano WPSA replacement tends to improve the compressive strength
of the HSC concrete by 10.7% compared to the control sample. On the
other hand, the 1% replacement of nano WPSA in HSC did not affect the
concrete's workability compared to the control sample. The conventional
HSC properties were improved with less usage of cement with the use of
WPSA.
Affiliation:
- Universiti Teknologi MARA Shah Alam, Selangor, Malaysia
- Universiti Teknologi MARA Shah Alam, Selangor, Malaysia
- Universiti Teknologi MARA Shah Alam, Selangor, Malaysia
- Universiti Teknologi MARA Shah Alam, Selangor, Malaysia
- Universiti Teknologi MARA Shah Alam, Selangor, Malaysia
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