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粉煤灰混凝土筏板基礎(chǔ)損傷特性研究

Study on Damage Characteristics of Fly Ash Concrete Raft Foundation

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吳磊

（福州市江南智慧城市建設(shè)運(yùn)營有限公司，福州 350000)

摘要：為明確混凝土材料損傷演變過程，揭示損傷內(nèi)在機(jī)制，研究粉煤灰混凝土筏板基礎(chǔ)損傷特性。粉煤灰按比例取代水泥，制備出粉煤灰混凝土，并測試粉煤灰用量對裂縫損傷特性的影響，分析不同環(huán)境下?lián)p傷度以及強(qiáng)度損傷變化。結(jié)果表明：增加粉煤灰摻量可延長首條裂縫出現(xiàn)時(shí)間，裂縫寬度與面積隨摻量增加呈下降趨勢，當(dāng)粉煤灰摻量達(dá)到 150 kg/cm3 時(shí) ，其裂縫損傷抑制效果最佳，且強(qiáng)度保持較好。因此證明，合理控制粉煤灰摻量可有效改善粉煤灰混凝土筏板基礎(chǔ)的抗裂性能與耐久性，為實(shí)際工程應(yīng)用提供重要參考。

關(guān)鍵詞：高層建筑；筏板基礎(chǔ) ；粉煤灰；混凝土；損傷特性

中圖分類號：TU528

文獻(xiàn)標(biāo)志碼：A

文章編號： 1005- 8249 (2025) 05- 0024- 04

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .05 .005

WU Lei

(Fuzhou Jiangnan Smart City Construction and Operation Co . , Ltd . , Fuzhou 350000 , China)

Abstract : To clarify the damage evolution process of concrete materials and reveal the inherent mechanism of damage , the damage characteristics of fly ash concrete raft foundation were studied . Fly ash was used to replace cement in proportion to prepare fly ash concrete , and the influence of fly ash content on crack damage characteristics was tested . The damage degree and strength damage changes under different environments were analyzed . The results showed that an increase in fly ash content could prolong the time for the first crack to appear , and the crack width and area decreased with increasing content. When the fly ash content reached 150 kg , the crack damage suppression effect was optimal , and the strength remained good . Therefore , it is proven that reasonably controlling the fly ash content can effectively improve the crack resistance and durability of fly ash concrete raft foundation , providing an important reference for practical engineering applications .

Key words : high - rise buildings; raft foundation; fly ash; concrete; damage characteristics

作者簡介：吳磊 (1975—) , 男，本科，高級工程師，主要研究方向：工程技術(shù)與建設(shè)管理。

收稿日期：2025 - 05 - 19