What is the material ratio of modern rammed earth wall?

Rammed earth wall is mainly composed of raw soil, gravel, gravel and clay (the ratio of soil, stone and sand is 5: 3: 2). Rammed earth wall made of this gradation has inherent defects in waterproof, durability and mechanics.

The reason why modern rammed earth walls have high strength is that special materials such as cement, soil curing agent and glass fiber are added into the materials, and then the mechanical strength of sintered clay bricks is achieved through high-density compaction (the rammed earth strength made by adjusting the proportion can reach the level of concrete), and the water resistance and durability are high. Adding different colors of soil or pigments can make colorful texture effects.

Matters needing attention in rammed earth wall construction

The basic process and composition of rammed earth wall building construction: survey and setting out-foundation pit excavation-foundation construction-wall compaction-ring beam pouring-purlin erection-roof treatment-door and window installation-construction completion, etc. In the construction of rammed earth wall, in order to keep the formwork parallel and vertical, wooden keels with the same thickness as the wall are usually placed in pairs.

When the rammed wall is high, it should be used with scaffolding to ensure the safety of construction personnel during the rammed wall construction. During the construction of rammed wall, special attention should be paid to the vertical and horizontal control of formwork and each rammed layer. In addition to the compacted first-layer foundation, the self-weight of the formwork is transferred to the top of the rammed wall at the lower part through the wall-penetrating screw at the lower part. Although the stress section of the screw is small, the density of the newly rammed soil is high, and the self-weight of the formwork is light, which will not damage the newly rammed part at the lower part.

The above contents refer to Baidu Encyclopedia-Rammed Earth Wall.