Experiment on the Performance of Recycled Powder of Construction Waste on Adobe Materials

Abstract

With the widespread use of adobe materials in buildings, their durability can deteriorate under harsh weather conditions such as long-term low temperatures and rainfall, which can easily lead to safety accidents. This article takes adobe material mixed with construction waste recycled powder as the research object and adds the prepared construction waste recycled concrete powder and recycled brick powder to the adobe material in different proportions to study the mechanical and durability properties of the adobe material. The results indicate that under normal temperature curing conditions, the compressive strength of the adobe sample significantly increases with the increase in the recycled powder content, and then decreases. Under high-temperature conditions, with the increase in the recycled powder content, the compressive strength of the adobe sample first significantly increases and then decreases. When the powder content is within the range of 6% to 10%, good moisture absorption and desorption performance can be achieved. When the content of recycled powder is between 2% and 10%, the effect on the dry–wet cycling performance of the adobe is weakest. When the content of grade I/II recycled brick powder is between 2% and 6%, and the content of grade I recycled concrete powder is between 2% and 6%, the negative impact on the freeze–thaw cycle performance is relatively weak. The research results provide theoretical data support for the mixed-use of recycled powder and adobe materials.

Urban Construction Waste Recycling Path: Robust Optimization

“…Constraint (7) ensures that the quantity transported from i to j does not exceed the transport capacity from i to j. Constraint (8) ensures that the quantity transported from i to j does not exceed the design capacity of treatment plant j. Constraint (9) ensures that the amount of waste transported from j to m does not exceed the quantity of residues generated at the design capacity of treatment plant j. Constraint (10) ensures that the actual quantity transported from j to m does not exceed the transport capacity from j to m. Constraint (11) ensures that the actual quantity transported to m does not exceed the capacity of landfill m.…”

“…The study of the existing construction waste recycling system shows that China has basically reduced construction waste, but the reutilization rate of construction waste remains low [6]. At present, the construction waste reutilization technology of China is Buildings 2023, 13, 2802 2 of 17 relatively mature [7,8], so to improve the construction waste recycling efficiency is to solve the problem of low reutilization rate of construction waste. The low recycling efficiency is due to various reasons, among which the most critical problem is the difficulty of recycling raw materials due to unreasonable transport path planning [9,10].…”