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BAM Shotcrete – The Difference Between Gunite and Shotcrete

BAM Shotcrete is a new method of cement application that involves spraying concrete at a high velocity. It’s often used for applications that need to be finished quickly such as in tunnel construction. This technology is also popular for swimming pools and can be applied on hard to reach surfaces.

It can be difficult to keep up with all the terms, technologies, methods, and processes professional pool builders throw around on a daily basis. While researching your new inground pool you may have come across words like gunite and shotcrete. But what is the difference between these two types of concrete? And how does it affect your pool building process?

When foundation issues occur, many homeowners think BAM Shotcrete they only have two basic options: Pour a new foundation or move. However, there is a third option. Shotcrete is a unique concrete material that can be used to stabilize foundations and walls. When paired with other structural components, such as earth anchors, it can provide a safe and stable solution to many different problems.

Shotcrete is a wet-mix concrete that can be sprayed at high pressure from an air-powered nozzle. It is usually used in conjunction with other structural materials, such as steel reinforcement bar, to reinforce both temporary and permanent excavations. The wet-mix shotcrete method offers several advantages over traditional mass concrete, including shorter construction time and lower environmental impact. It is also less susceptible to damage from frost and other environmental factors, such as mold and worms.

In addition to the normal construction techniques of mass concrete, the shotcrete method allows for more efficient and flexible use of magnesia concrete. This can be important in achieving the high performance required for engineered barriers at nuclear waste repositories, where rapid construction and good gas permeability are key requirements. In a recent investigation, a series of tests was carried out on magnesia concrete for drift sealing elements in the Teutschenthal repository in Germany [9]. Engineered barriers constructed as either mass concrete or shotcrete were analysed with varying aggregate sizes (salt or hard stone) and dry-mix or wet-mix shotcrete procedures.

With both the dry-mix and wet-mix shotcretes, a mixture is pumped from a mixer to the nozzle and compressed air is introduced to impel the concrete onto the receiving surface. The wet-mix procedure produces less rebound, waste, and dust than the dry-process shotcrete and allows for larger volumes to be sprayed in a shorter amount of time.

In addition to the normal inspection techniques, the shotcrete was examined with ultrasonic scanning. The acoustic signals generated by the reflection of ultrasonic waves in the shotcrete were recorded and analysed. The results show that significant artificial defects, such as delaminations, can be reliably identified by using the acquired data. However, small-scale individual artificial defects cannot be unambiguously identified due to the inhomogeneous internal diffuse reflectivity and attenuation of the ultrasonic signal.