Introduction

Refractory bricks and ordinary bricks are commonly encountered in masonry structures. While both are types of bricks, they vary considerably in appearance, physical properties, and applications. This article aims to provide a concise overview of the differences between the two.

1. Visual Differences

Ordinary bricks are often seen as red bricks, characterized by their reddish-brown color and varying patterns. The standard dimensions are typically 240*115*53mm.

In contrast, refractory bricks come in various types, such as high-alumina bricks, corundum bricks, and mullite bricks, exhibiting colors like white, beige, and black. Their common dimensions are primarily 230*114*65mm.

2. Physical Properties

Regarding heat resistance, ordinary bricks have a limited refractory capability, generally below 1000°C. In contrast, refractory bricks have a refractoriness usually above 1200°C, with some high-quality types exceeding 2000°C. The compressive strength of ordinary bricks is lower than that of refractory bricks. Additionally, ordinary bricks have inferior acid and alkali resistance. Ordinary bricks soften and deform at high temperatures, while refractory bricks can withstand extremely high temperatures without deforming or cracking.

3. Application Differences

There is also a significant difference in application. Ordinary bricks are predominantly used in building walls, serving to support and insulate structures. In contrast, refractory bricks are designed specifically for high-temperature industrial kilns, such as those in steel mills, glass factories, and cement plants, where they endure significant thermal stress.

In summary, the distinctions between ordinary bricks and refractory bricks are considerable. When choosing between the two, it is essential to consider the specific application and requirements. Additionally, the price varies significantly; ordinary bricks can cost mere cents each, while refractory bricks range from several to dozens of dollars each, leading to a higher overall cost when used in standard construction.