New and used Crushers for sale | Ritchie Bros.
Search our inventory to find jaw crushers, impact crushers, cone crushers, cone crushing plants, jaw crushing plants, roll crushers, roll crushing plants, and hammermills. More crushers added daily from manufacturers such as , Case, John , , JCB, Bobcat and more. Check back often or create a free account and save your ...,？~ - Douban2013-3-6 · In some types of precast concrete such as railway sleepers, strengths ranging from 40 to 65 N/mm2 at 28days are obtained with rich mixes having a low water/cement ratio. The crushing strength of concrete is influenced by a number of factors in addition to the water/cement ratio and the degree of compaction.