Chronic simple silicosis has been reported to occur from environmental exposures to silica in regions with high silica soil content and frequent dust storms.
有报道慢性简单矽肺发生的环境暴露硅，高硅土含量和沙尘暴频繁的地区。
The results suggest that nanometer silica fume can greatly improve the unconfined compression strength of cemented soil at various curing periods.
试验表明，一定掺量下的纳米硅粉能够显著提高水泥土的各个龄期强度。
Based on the experiments, strength characteristics of nanometer silica fume reinforced cemented soil have been analyzed.
通过室内试验，探讨了纳米硅粉水泥土的强度特性。
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