混凝土与水泥制品
混凝土與水泥製品
혼응토여수니제품
CHINA CONCRETE AND CEMENT PRODUCTS
2015年
4期
29-32
,共4页
免蒸压%管桩%延迟钙矾石%高强掺合料
免蒸壓%管樁%延遲鈣礬石%高彊摻閤料
면증압%관장%연지개반석%고강참합료
Non-autoclaved%Piles%Delayed ettringite formation%High strength admixture
养护温度大于70℃的混凝土制品有产生延迟钙矾石膨胀的风险。为避免免蒸压管桩也产生这种风险,利用新型高强掺合料拌合的混凝土,经70℃的蒸汽养护6h,试块能满足C80的强度要求。与不掺相比,新型高强掺合料的掺入能大幅提高混凝土的抗压强度和耐久性。微观分析表明,掺新型高强掺合料的混凝土内部生成了大量的纤维状玉型C- S- H,填充了内部孔隙,从而提高了混凝土的强度和耐久性。
養護溫度大于70℃的混凝土製品有產生延遲鈣礬石膨脹的風險。為避免免蒸壓管樁也產生這種風險,利用新型高彊摻閤料拌閤的混凝土,經70℃的蒸汽養護6h,試塊能滿足C80的彊度要求。與不摻相比,新型高彊摻閤料的摻入能大幅提高混凝土的抗壓彊度和耐久性。微觀分析錶明,摻新型高彊摻閤料的混凝土內部生成瞭大量的纖維狀玉型C- S- H,填充瞭內部孔隙,從而提高瞭混凝土的彊度和耐久性。
양호온도대우70℃적혼응토제품유산생연지개반석팽창적풍험。위피면면증압관장야산생저충풍험,이용신형고강참합료반합적혼응토,경70℃적증기양호6h,시괴능만족C80적강도요구。여불참상비,신형고강참합료적참입능대폭제고혼응토적항압강도화내구성。미관분석표명,참신형고강참합료적혼응토내부생성료대량적섬유상옥형C- S- H,전충료내부공극,종이제고료혼응토적강도화내구성。
Concrete products under the curing temperature over 70℃have the risk of expansion damage from delayed ettringite formation. In order to avoid such risk on non-autoclaved piles, C80 concrete were made by a new type of high strength admixture, and the curing temperature was kept at 70℃. With such admixture, the compressive strength and dura-bility of the concrete were improved. Microscopic analysis showed that such admixture can help cement to produce mas-sively fibrous玉type of C-S-H gel, which filled the pores inside of the concrete to improve the strength and durability.
