What Is the Use of Washed Stone Powder

Stone powder is a byproduct generated during the sand-making process. While it typically contains higher levels of dust and impurities, it can be converted into high-quality sandstone through processing with a stone powder sand washing machine. What are the primary applications of washed stone powder? Once sieved and washed, provided that mud and stone powder content are controlled within reasonable limits, it serves as an effective substitute for ordinary machine-made sand across various industries. Its main purpose is to optimize concrete and mortar mixes by improving the gradation of ultra-fine aggregates. Additionally, it finds use in household chemicals, ceramics, cement, glass, smelting, and refractory materials.

The Role of Stone Powder in Manufactured Sand Concrete

1. Hydration

Studies indicate that ettringite formed during the early stages of hydration transforms into monosulfoaluminate in later stages, which can reduce the strength of the cement paste. However, adding stone powder containing calcium carbonate effectively addresses this issue. Furthermore, since stone powder is primarily composed of calcium carbonate, it reacts with C3A to form hydrated calcium aluminate, thereby enhancing concrete strength.

2. Filling Effect

Stone powder fills voids within the concrete matrix, acting as a filler to increase density and functioning as an inert admixture. For mixtures characterized by low cementitious content and suboptimal performance, using manufactured sand concrete of medium-to-low strength grades can effectively compensate for these deficiencies.

3. Water Retention and Thickening Effect

The inclusion of stone powder in artificial concrete reduces the risk of segregation and bleeding in the mixture. Because stone powder absorbs water within the concrete, it effectively increases the apparent water demand. Consequently, the higher the stone powder content, the greater the viscosity of

concrete. In addition, incorporating stone powder can also reduce concrete shrinkage and compensate for later hydration water needs, as the moisture previously absorbed by the stone powder is gradually released even after the concrete has hardened.

Introduction to the performance of stone powder sand washing equipment

LZZG’s Multifunctional Sand Washing and Recycling Integrated Machine is the result of years of practical experience and technological innovation. LZZG has launched the DS series multifunctional sand washing and recycling all-in-one equipment. As professional sand washing equipment, this machine integrates multiple water washing stages, centralized dewatering for both coarse and fine sand, and fine sand recovery. Compared with earlier sand washing and recycling integrated machines, its performance has been significantly enhanced. Unlike previous sand washing equipment, this multifunctional sand washing machine cleverly combines a spiral sand washer, an impeller sand washer, and a fine sand recovery unit, enabling one device to fulfill functions that previously required multiple units in a single production line. The product features a rational structural design and, more importantly, powerful sand washing and fine sand recovery capabilities, helping customers achieve maximum economic benefits.