Ảnh hưởng của hàm lượng sợi Poly Propylene đến cường độ uốn và môđun đàn hồi của bê tông

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Tác giả: Văn Dũng Đỗ, Thế Sang Lê, Huy Vững Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Trường Đại học Bình Dương, 2023

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ID: 345980

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Mục tiêu nghiên cứu là tìm ra các ảnh hưởng của hàm lượng sợi poly propylenđến khả năng chịu uốn và mô đun đàn hồi của bê tông nền, đánh giá mối quan hệ giữa sợipolypropylen đến khả năng chịu uốn và mô đun đàn hồi của bê tông, khả năng ứng dụngcủa bê tông khi có thêm sợi gia cường polypropylen trong kết cấu bê tông, đánh giá khảnăng làm việc của hỗn hợp bê tông có thêm sợi polypropylen khi được bổ sung thêm phụphẩm silicafume. Vật liệu sử dụng để thiết kế cấp phối với hàm lượng thay đổi: sợi polypropylen với hàm lượng 0%
0,5%
1,%
1.5% và 2% theo thể tích bê tông, tỷ lệ hàm lượngphụ phẩm silicafume theo khối lượng xi măng, cát, đá, xi măng, phụ gia dẻo 1,5% và cấpphối đối chứng. Bê tông cấp phối có gia cường phụ phẩm đạt cấp độ bền B25. Nghiên cứuđược thực hiện bởi các vật liệu thí nghiệm có sẵn tại Việt Nam. Kết quả nghiên cứu thấyđược, bê tông có sử dụng sợi polypropylen có khả năng được tăng cường độ uốn, đồng thờisử dụng phụ gia silicafume sẽ làm cho sợi có độ bám dính tốt hơn trong bê tông, cường độchịu uốn của mẫu thí nghiệm gián tiếp được cao hơn hơn.The aim of the study is to find out the effects of polypropylene fiber content onthe flexural strength and elastic modulus of concrete, and to evaluate the relationshipbetween polypropylene fibers and the flexural and elastic modulus of the concrete.concrete, the applicability of concrete with the addition of polypropylene fiberreinforcement in the concrete structure, evaluation of the working ability of the concretemixture with the addition of polypropylene fibers when supplemented with silicafume byproducts. Materials used to design the mix with variable content: polypropylene fiber with0% content
0.5%
1.0%
1.5% and 2% by volume of concrete, proportion of silicafumeby-products by weight of cement, sand, stone, cement, plasticizer admixture 1.5% andcontrol mix. Graded concrete with by-product reinforcement reaches durability grade B25.The study was carried out using experimental materials available in Vietnam. Researchresults show that concrete using polypropylene fibers has the ability to increase flexuralstrength, and at the same time, using silicafume additives will make the fibers have betteradhesion in concrete, and the flexural strength of the samples. indirect experiments werehigher.

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