The invention relates to a
graphite-paraffin composite phase-changing and energy-storing concrete and a preparation method thereof. In the phase-changing and energy-storing concrete,
cement, water, sand, gravels and a
water reducer are used as substrates, and paraffin phase-changing materials,
graphite with enhanced
heat conducting function, and
fiber reinforced materials with enhanced
mechanical strength are also comprised. The preparation method comprise the steps of: firstly, mixing the paraffin and the
graphite, heating until the paraffin totally melts, and continuously stirring to uniformly mix the paraffin and the graphite into a viscous form; putting the sand and the gravels into a stirrer, then putting fibers and the
cement, carrying out
dry mixing, adding the water and the
water reducer subsequently, and rapidly stirring to reach a uniform state; and then putting the molten paraffin-graphite
viscose mixture into the obtained concrete mixture, and uniformly mixing. Because the graphite is added into the paraffin to be used as an additive, the coefficient of heat
conductivity of the phase-changing and energy-storing concrete is greatly enhanced, so that the heat storing and releasing efficiency of an energy-storing material is enhanced.