• Yuktha Sriram K
• Manoj Kumar N N
• Vivek H C

The growing population has increased the demand for natural resources, raising concerns over sustainability. Climate change and environmental issues highlight the need for innovative and eco-conscious construction methods. Light Transmitting Concrete (LTC) emerges as a sustainable solution by allowing natural sunlight to pass through concrete. In this study, optical fibres of 0.75 mm diameter were embedded in M25 grade concrete in three different grid patterns - 6×6, 7×7, and 8×8 to analyse their effect on strength characteristics. Compressive strength and bond strength were evaluated after 28 days of curing. The results demonstrated that as the number of optical fibres increased, both compressive and bond strengths improved compared to specimens without fibres. An increase of approximately 6.65% in 28-day compressive strength and 24.52% in bond strength was observed compared to conventional concrete. The strength enhancement is attributed to the optical fibres acting as micro reinforcements, improving the bond between the fibres and the concrete matrix. This study also evaluated the light-transmitting properties of concrete using an LED bulb as a light source, and light intensity was measured in lumens using a light meter. The results indicated that the addition and increased quantity of optical fibres significantly enhance the light intensity transmitted through the concrete.

Light transmitting concrete, Plastic optical fiber, Compressive strength, Bond strength, Light meter.

"Study on the effect of inducing optical fiber in matrix of light emitting concrete", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 5, page no.l489-l496, May-2025, Available :http://www.jetir.org/papers/JETIR2505C43.pdf

"Study on the effect of inducing optical fiber in matrix of light emitting concrete", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 5, page no. ppl489-l496, May-2025, Available at : http://www.jetir.org/papers/JETIR2505C43.pdf