stockyard venues and carriageways must be ground treatment and surface hardening, and meet the requirements of heavy vehicles; site should drainage facilities, drainage flow, no significant accumulation of water or crater phenomena. Site field view.
2013年8月18日星期日
Block concrete mixture aggregate size
From concrete vibration technology perspective, strong Forced vibration frequency as close to the concrete mixture particles is generated when the natural frequency Resonance, Concrete mixing plant the minimum amplitude of up to max. Block concrete mixture Aggregate particle size of 3-10mm desired vibration frequency of 100-125Hz, but for a block Machines are not up to it, the United States is generally 46-47 Hz European high individual molding machine Up to 66-67 Hz. Which could be a vibrating system life, cement mixing machine too high, bearing And other short life, vibration frequency of some significance in theory, but in actual project Point of view, especially for larger power mode vibration machine vibration is of little significance Because the actual vibration molding time is only 1-2 seconds, in such a short period of time to mix Concrete mixes different vibration frequencies applied, compacting effect will not change significantly Technology.
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